Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current income tax provision:
Federal									$ 7,008	$ 6,403	$ 3,781
State									2,329	2,026	1,386
Total current income tax provision									9,337	8,429	5,167
Deferred income tax provision (benefit):
Federal									(3,129)	1,262	899
State									(621)	298	345
Total deferred income tax provision (benefit)									(3,750)	1,560	1,244
Total income tax provision	2,474	1,846	91	1,176	2,421	2,126	3,795	1,647	5,587	9,989	6,411
Reconciliation from statutory federal income taxes to the company's effective income taxes
Statutory federal income tax provision									5,103	8,760	5,774
California franchise tax, net of federal income tax effect									1,027	1,842	1,214
Other, including tax exempt income									(543)	(613)	(577)
Total income tax provision	2,474	1,846	91	1,176	2,421	2,126	3,795	1,647	5,587	9,989	6,411
Deferred tax assets:
Accrued expenses	891				442				891	442
Net operating loss	3,353				3,673				3,353	3,673
Allowance for loan losses, net of bad debt charge-offs	3,336				3,390				3,336	3,390
Directors deferred compensation	1,896								1,896
Unrealized loss on available for sale securities	2,160								2,160
State taxes	858				765				858	765
Capital loss on mutual funds					281					281
Other-than-temporary impairment	684				2,180				684	2,180
Restricted stock and options expense	6				6				6	6
Other					147					147
Total deferred tax assets	13,184				10,884				13,184	10,884
Deferred tax liabilities:
Federal Home Loan Bank stock dividends	(306)				(560)				(306)	(560)
Deferred FDIC gain	(1,944)				(2,367)				(1,944)	(2,367)
Core deposit intangibles	(1,813)								(1,813)
Depreciation	(216)				(111)				(216)	(111)
Unrealized gain on available for sale securities					(772)					(772)
Other	(428)				(187)				(428)	(187)
Total deferred tax liabilities	(4,707)				(3,997)				(4,707)	(3,997)
Net deferred tax asset	$ 8,477				$ 6,887				$ 8,477	$ 6,887