Note 21: Stock Option Plan: Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable (Details) - Range of Exercise Prices	12 Months Ended
	Dec. 31, 2015 $ / shares shares
$8.360 to $19.530
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares	80,449
Share based compensation stock option weighted average remaining contractual term	5.50 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 17.834
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	57,639
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 17.281
$21.320 to $24.820
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares	129,593
Share based compensation stock option weighted average remaining contractual term	6.02 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 23.694
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	82,473
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 23.094
$25.480 to $29.860
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares	138,770
Share based compensation stock option weighted average remaining contractual term	6.55 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 28.632
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	57,586
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 27.408
$30.660 to $39.050
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares	169,570
Share based compensation stock option weighted average remaining contractual term	7.69 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 32.628
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	23,870
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 30.660
$41.500 to $50.710
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares	115,350
Share based compensation stock option weighted average remaining contractual term	9.88 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 50.478
Options outstanding and exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares	633,732
Share based compensation stock option weighted average remaining contractual term	7.22 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares	$ 31.297
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	221,568
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 23.518