Note 21: Stock Option Plan: Schedule of Nonvested Share Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Nonvested options beginning of period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	300,644
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price	$ 19.744
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value	$ 4.940
Nonvested options granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	105,200
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price	$ 24.759
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value	$ 4.545
Nonvested options vested this period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	(63,730)
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price	$ 20.035
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value	$ 5.509
Nonvested options forfeited
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	(41,411)
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price	$ 19.709
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value	$ 5.563
Nonvested options end of period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	300,703
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Exercise Price	$ 21.442
Share Based Compensation Arrangement by Share Based Payment Award Nonvested Weighted Average Grant Date Fair Value	$ 4.596