Note 2: Investments in Debt and Equity Securities: Schedule of Available-for-sale Securities Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Available-for-sale Securities, Amortized Cost Basis	$ 354,378
Available-for-sale Securities Fair Value	365,506
Available-for-sale Securities
Available-for-sale Securities, Amortized Cost Basis	354,378	551,441
Available For Sale Debt Securities Gross Unrealized Gain	12,442	10,789
Available For Sale Debt Securities Gross Unrealized Loss	1,314	6,949
Available-for-sale Securities Fair Value	365,506	555,281
US Government Agencies Debt Securities
Available-for-sale Securities, Amortized Cost Basis	20,000	20,000
Available For Sale Debt Securities Gross Unrealized Loss	486	2,745
Available-for-sale Securities Fair Value	19,514	17,255
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Available-for-sale Securities, Amortized Cost Basis	254,294	365,020
Available For Sale Debt Securities Gross Unrealized Gain	4,325	4,824
Available For Sale Debt Securities Gross Unrealized Loss	821	2,266
Available-for-sale Securities Fair Value	257,798	367,578
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Amortized Cost Basis	79,237	122,113
Available For Sale Debt Securities Gross Unrealized Gain	5,810	2,549
Available For Sale Debt Securities Gross Unrealized Loss	7	1,938
Available-for-sale Securities Fair Value	85,040	122,724
Equity Securities
Available-for-sale Securities, Amortized Cost Basis	847	847
Available For Sale Debt Securities Gross Unrealized Gain	2,307	2,022
Available-for-sale Securities Fair Value	3,154	2,869
Small Business Administration Loan Pools
Available-for-sale Securities, Amortized Cost Basis		43,461
Available For Sale Debt Securities Gross Unrealized Gain		1,394
Available-for-sale Securities Fair Value		$ 44,855