Note 16: FDIC-assisted Acquisition: Schedule of Certain Assets and Liabilities Acquired (Details) (Valley Bank, USD $) In Thousands, unless otherwise specified	Jun. 20, 2014
Assets | Cash
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 2,729
Assets | Due From Banks
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	106,680
Assets | Cash and Cash Equivalents
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	109,409
Assets | Securities Investment
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	88,513
Assets | Loans Receivable Net
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	165,098	[1]
Assets | Accrued Interest Receivable
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	1,004
Assets | Property, Plant and Equipment
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	10,850
Assets | Core Deposits
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	2,800
Assets | Other Assets
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	1,060
Assets | Total Assets Acquired
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	378,734
Liabilities | Demand Deposits
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	186,902
Liabilities | Bank Time Deposits
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	179,125
Liabilities | Deposits
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	366,027
Liabilities | Repurchase Agreements
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	567
Liabilities | Accounts Payable
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	561
Liabilities | Accrued Interest Payable
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	182
Liabilities | Advances From Borrowers For Taxes And Insurance
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	592
Liabilities | Total Liabilities Assumed
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	367,929
Liabilities | Gain Recognized On Business Acquisition
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 10,805

[1] Net of discount on loans purchased of $30,102.