Income Taxes (Details) (USD $)	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
Components of Income Tax Expense (Benefit), Continuing Operations
Current tax expense									$ 4,369,000	$ 11,054,000	$ 4,692,000
Deferred tax expense (benefit)									2,503,000	(3,198,000)	2,419,000
Total	1,104,000	2,185,000	1,456,000	2,127,000	2,153,000	2,359,000	1,173,000	2,171,000	6,872,000	7,856,000	7,111,000
Future tax credits					3,100,000					3,100,000
Reconciliation between statutory federal income tax rate and effective tax rate
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate									7,479,000	8,645,000	8,072,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate									35.00%	35.00%	35.00%
Income Tax Reconciliation, Tax Credits									0	(480,000)	(480,000)
Effective Income Tax Rate Reconciliation, Tax Credits									0.00%	(1.90%)	(2.10%)
Income Tax Reconciliation, Tax Exempt Income									(588,000)	(512,000)	(471,000)
Effective Income Tax Rate Reconciliation, Tax Exempt Income									(2.70%)	(2.10%)	(2.00%)
Income Tax Reconciliation, Other Adjustments									(19,000)	203,000	(10,000)
Effective Income Tax Rate Reconciliation, Other Adjustments									(0.10%)	0.80%	(0.10%)
Effective Income Tax Rate, Continuing Operations									32.20%	31.80%	30.80%
Deferred tax assets:
Covered assets	3,410,000				19,877,000				3,410,000	19,877,000
Allowance for loan losses	11,100,000				7,139,000				11,100,000	7,139,000
Fair value adjustment of investment securities available for sale	2,799,000				0				2,799,000	0
Deferred compensation	535,000				473,000				535,000	473,000
Other	1,199,000				848,000				1,199,000	848,000
Deferred Tax Assets, Gross	19,043,000				28,337,000				19,043,000	28,337,000
Deferred tax liabilities:
FDIC indemnification asset	6,190,000				13,943,000				6,190,000	13,943,000
Deferred loan fees	1,600,000				1,518,000				1,600,000	1,518,000
Premises and equipment	590,000				629,000				590,000	629,000
FHLB stock dividend	144,000				152,000				144,000	152,000
Investment in partnership	1,092,000				1,092,000				1,092,000	1,092,000
Prepaid expenses	295,000				217,000				295,000	217,000
Fair value adjustment of investment securities available for sale	0				2,531,000				0	2,531,000
Purchase accounting	4,277,000				6,451,000				4,277,000	6,451,000
Other	278,000				54,000				278,000	54,000
Deferred Tax Liabilities, Gross	14,466,000				26,587,000				14,466,000	26,587,000
Deferred tax assets (liabilities), net	4,577,000				1,750,000				4,577,000	1,750,000
Deferred Tax Assets, Valuation Allowance	$ 0								$ 0