Note 26: Condensed Parent Company Statements: Schedule of Parent Company Condensed Statements of Financial Condition (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Cash	$ 107,949	$ 87,911
Available-for-sale securities	807,010	875,411
Held-to-maturity securities	920	1,865
Additional paid-in capital	18,394	17,183
Retained earnings	276,751	236,914
Statements of Financial Condition | Parent Company | Assets
Cash	23,430	21,446
Available-for-sale securities	2,006	1,831
Held-to-maturity securities		840
Investments in subsidiary bank	375,281	333,482
Income Taxes Receivable, Current	32	42
Prepaid expenses and other assets	1,059	1,089
Statements of Financial Condition | Parent Company | Liabilities and Stockholders' Equity
Accounts Payable and Accrued Liabilities	599	3,004
Deferred Tax Liabilities, Gross	406	210
Subordinated Debt	30,929	30,929
Preferred Stock Value Parent	57,943	57,943
Common Stock Value Parent	136	134
Additional paid-in capital	18,394	17,183
Retained earnings	276,751	236,914
Unrealized gain on available-for-sale securities, parent net	16,650	12,413
Total Assets and Liabilities	$ 401,808	$ 358,730