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This award will vest in full on June 15, 2020. Not included in the reported award amount is a target amount of performance-based restricted stock units that will vest on June 15, 2020, but which are subject to the satisfaction of certain performance criteria other than solely the price of Casey's Common Stock; the final amount of shares earned, if any, will be reported upon vest and satisfaction of those performance measures."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each restricted stock unit represents the right to receive, following vesting, one share of Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to terms and conditions of 2009 Stock Incentive Plan.  This award will vest in full on June 15, 2020. Not included in the reported award amount is a target amount of performance-based restricted stock units that will vest on June 15, 2020, but which are subject to the satisfaction of certain performance criteria other than solely the price of Casey's Common Stock; the final amount of shares earned, if any, will be reported upon vest and satisfaction of those performance measures."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Pursuant to terms and conditions of 2009 Stock Incentive Plan.  This award will vest in full on June 15, 2020. Not included in the reported award amount is a target amount of performance-based restricted stock units that will vest on June 15, 2020, but which are subject to the satisfaction of certain performance criteria other than solely the price of Casey's Common Stock; the final amount of shares earned, if any, will be reported upon vest and satisfaction of those performance measures."}],"balance_after":1773,"derivative":{"underlying":"Commom Stock","underlying_shares":1773},"source":{"system":"sec-edgar","filing":"0000726958-17-000067","document":"wf-form4_150040475573496.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/726958/000072695817000067/wf-form4_150040475573496.xml","form_type":"4"}},{"id":4255913,"issuer":{"id":3156,"kind":"organization","name":"CASEYS GENERAL STORES INC","symbol":"CASY"},"owners":[{"id":150479,"kind":"person","name":"Walljasper William J","position":1,"cik":"0001303323","reported_name":"Walljasper William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior VP and CFO"}}],"security":"Common Stock","published_at":"2017-07-18T19:04:47.000Z","date":"2016-12-21","kind":"gift","acquired":false,"shares":100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The number of shares reported reflects a bona fide gift of shares to a charitable organization on the transaction date that has not been previously reported by Mr. Walljasper.  The omitted shares also were included in the Table I, Column 5 beneficial ownership reported in the intervening Forms 4 and 4/A filed by Mr. Walljasper between the applicable transaction date and this Form 5."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Reflects the number of shares directly owned by Mr. Walljasper as of the end of Casey's fiscal year, April 30, 2017, taking into account the amendment reported on Form 4/A being filed with this Form 5."}],"balance_after":19386,"source":{"system":"sec-edgar","filing":"0000726958-17-000065","document":"wf-form5_150040467286053.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/726958/000072695817000065/wf-form5_150040467286053.xml","form_type":"5"}},{"id":4255912,"issuer":{"id":3156,"kind":"organization","name":"CASEYS GENERAL STORES INC","symbol":"CASY"},"owners":[{"id":150479,"kind":"person","name":"Walljasper William J","position":1,"cik":"0001303323","reported_name":"Walljasper William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior VP and CFO"}}],"security":"Common Stock","published_at":"2017-07-18T19:04:47.000Z","date":"2015-07-02","kind":"gift","acquired":false,"shares":200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The number of shares reported reflects a bona fide gift of shares to a charitable organization on the transaction date that has not been previously reported by Mr. Walljasper.  The omitted shares also were included in the Table I, Column 5 beneficial ownership reported in the intervening Forms 4 and 4/A filed by Mr. Walljasper between the applicable transaction date and this Form 5."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Reflects the number of shares directly owned by Mr. Walljasper as of the end of Casey's fiscal year, April 30, 2017, taking into account the amendment reported on Form 4/A being filed with this Form 5."}],"balance_after":19386,"source":{"system":"sec-edgar","filing":"0000726958-17-000065","document":"wf-form5_150040467286053.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/726958/000072695817000065/wf-form5_150040467286053.xml","form_type":"5"}},{"id":4255911,"issuer":{"id":3156,"kind":"organization","name":"CASEYS GENERAL STORES INC","symbol":"CASY"},"owners":[{"id":150479,"kind":"person","name":"Walljasper William J","position":1,"cik":"0001303323","reported_name":"Walljasper William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior VP and CFO"}}],"security":"Common Stock","published_at":"2017-07-18T19:04:47.000Z","date":"2013-12-23","kind":"gift","acquired":false,"shares":150,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The number of shares reported reflects a bona fide gift of shares to a charitable organization on the transaction date that has not been previously reported by Mr. Walljasper.  The omitted shares also were included in the Table I, Column 5 beneficial ownership reported in the intervening Forms 4 and 4/A filed by Mr. Walljasper between the applicable transaction date and this Form 5."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Reflects the number of shares directly owned by Mr. Walljasper as of the end of Casey's fiscal year, April 30, 2017, taking into account the amendment reported on Form 4/A being filed with this Form 5."}],"balance_after":19386,"source":{"system":"sec-edgar","filing":"0000726958-17-000065","document":"wf-form5_150040467286053.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/726958/000072695817000065/wf-form5_150040467286053.xml","form_type":"5"}},{"id":4255910,"issuer":{"id":3156,"kind":"organization","name":"CASEYS GENERAL STORES INC","symbol":"CASY"},"owners":[{"id":150479,"kind":"person","name":"Walljasper William J","position":1,"cik":"0001303323","reported_name":"Walljasper William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior VP and CFO"}}],"security":"Common Stock","published_at":"2017-07-18T19:03:11.000Z","date":"2016-06-23","kind":"tax_withholding","acquired":false,"shares":1104,"price":124.6,"value":137558.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld in payment of the tax withholding triggered by the previously-reported award made on June 2, 2016 under the fiscal 2016 annual incentive program."},{"field":"shares","element":"transactionShares","label":"F2","text":"The number of shares reported is amended to include an additional 73 shares that were inadvertently omitted from the original Form 4 (1,031 shares were originally reported as withheld).  Three intervening Forms 4 filed by Mr. Walljasper between his original filing and this amendment also include the 73 shares in his Table I, Column 5 share ownership following the reported transaction."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Closing price of Casey's General Stores, Inc. 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This award vested in full on June 6, 2017."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each restricted stock unit represents the right to receive, following vesting, one share of Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to terms and conditions of 2009 Stock Incentive Plan.  This award vested in full on June 6, 2017."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Pursuant to terms and conditions of 2009 Stock Incentive Plan.  This award vested in full on June 6, 2017."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3250},"source":{"system":"sec-edgar","filing":"0000726958-17-000029","document":"wf-form4_149693988419879.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/726958/000072695817000029/wf-form4_149693988419879.xml","form_type":"4"}},{"id":4289170,"issuer":{"id":3156,"kind":"organization","name":"CASEYS GENERAL STORES INC","symbol":"CASY"},"owners":[{"id":150479,"kind":"person","name":"Walljasper William J","position":1,"cik":"0001303323","reported_name":"Walljasper William J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior VP and CFO"}}],"security":"Common Stock","published_at":"2017-06-08T16:38:23.000Z","date":"2017-06-06","kind":"tax_withholding","acquired":false,"shares":1084,"price":106.66,"value":115619.44,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Closing price of Casey's General Stores, Inc. 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