Note 1: Nature of Operations and Summary of Significant Accounting Policies: Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income Available to Common Shareholders	$ 42,950	$ 33,150	$ 48,098
Net Income from Continuing Operations	43,529	33,729	44,087
Basic	$ 3.14	$ 2.43	$ 3.55
Diluted	$ 3.10	$ 2.42	$ 3.54
Basic	$ 3.14	$ 2.43	$ 3.21
Diluted	$ 3.10	$ 2.42	$ 3.20
Earnings Per Share Basic and Diluted
Net Income Available to Common Shareholders	42,950	33,150	48,098
Net Income from Continuing Operations	43,529	33,729	44,087
Net income from continuing operations available to common shareholders	$ 42,950	$ 33,150	$ 43,479
Weighted Average Number of Shares Outstanding, Basic	13,700	13,635	13,534
Average common share stock options and warrants outstanding	176	80	58
Weighted Average Number of Shares Outstanding, Diluted	13,876	13,715	13,592
Basic	$ 3.14	$ 2.43	$ 3.55
Diluted	$ 3.10	$ 2.42	$ 3.54
Basic	$ 3.14	$ 2.43	$ 3.21
Diluted	$ 3.10	$ 2.42	$ 3.20
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share			$ 0.34
Earnings per share, basic
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share			$ 0.34