Fair Value Measurement: Schedule of Fair Value of Available for Sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair value U.S. government agencies
Fair value	$ 30,018	$ 20,060
Fair value measurements using other observable inputs (Level 2)	30,018	20,060
Fair value collateralized mortgage obligations
Fair value	4,773	4,840
Fair value measurements using other observable inputs (Level 2)	4,773	4,840
Fair value mortgage-backed securities
Fair value	600,156	641,655
Fair value measurements using other observable inputs (Level 2)	600,156	641,655
Fair value Small Business Administration loan pools
Fair value	53,739	56,492
Fair value measurements using other observable inputs (Level 2)	53,739	56,492
Fair value corporate bonds
Fair value	294	150,238
Fair value measurements using other observable inputs (Level 2)	294	150,238
Fair value states and political subdivisions
Fair value	127,785	295
Fair value measurements using other observable inputs (Level 2)	127,785	295
Fair value equity securities
Fair value	2,426	1,831
Fair value measurements using quoted prices in active markets for identical assets (Level 1)	607	387
Fair value measurements using other observable inputs (Level 2)	1,819	1,444
Fair value mortgage servicing rights
Fair value	194	292
Fair value measurements using significant unobservable inputs (Level 3)	194	292
Fair Value Interest Rate Swap Asset
Fair value	1,200	111
Fair value measurements using significant unobservable inputs (Level 3)	1,200	111
Fair Value Interest Rate Swap Liability
Fair value	(1,230)	(121)
Fair value measurements using significant unobservable inputs (Level 3)	$ (1,230)	$ (121)