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Note 21: Stock Compensation Plans: Schedule of Nonvested Share Activity (Details) - Employee Stock Option | 12 Months Ended
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Dec. 31, 2018 $ / shares shares
Nonvested options | Balance, Beginning of Period |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | shares | 441,937
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price | $ 44.842
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value | $ 7.981
Nonvested options | Balance, End of Period |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | shares | 506,494
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price | $ 50.023
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value | $ 8.431
Granted |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | shares | 186,750
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price | $ 55.282
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value | $ 8.297
Vested this period |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | shares | (107,895)
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price | $ 38.433
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value | $ 6.398
Nonvested options forfeited |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | shares | (14,298)
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price | $ 46.057
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value | $ 8.143

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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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