Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 11,372	$ 8,761	$ 8,214
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	3,101	3,737	3,594
Depreciation, amortization and accretion, net	5,398	3,938	3,070
Compensation expense for vested stock options	52	52	53
Compensation expense for restricted stock and restricted stock units	92	0	0
Gain on investment securities, net	(486)	(543)	(637)
Other-than-temporary impairment losses on securities recognized in earnings	886	1,418	1,812
(Gain) loss on sales of other real property owned, net	853	(12)	353
Loss on write down of fixed assets	2	4	80
Gain on sale of merchant banking portfolio	0	0	(1,000)
Gain on sales of loans held for sale, net	(782)	(813)	(727)
Deferred income taxes	(670)	(435)	(1,515)
(Increase) decrease in accrued interest receivable	(662)	968	290
Decrease in accrued interest payable	(191)	(386)	(755)
Origination of loans held for sale	(61,375)	(63,924)	(62,904)
Proceeds from sales of loans held for sale	61,225	64,772	64,019
Increase in other assets	(1,900)	(5,955)	(7,145)
Increase (decrease) in other liabilities	2,061	(4,074)	1,522
Net cash provided by operating activities	18,976	7,508	8,324
Cash flows from investing activities:
Proceeds from maturities of certificates of deposit investments	10,000	10,605	1,992
Purchase of certificates of deposits investments	(13,231)	(11,261)	(11,336)
Proceeds from sales of securities available-for-sale	18,891	10,936	38,275
Proceeds from maturities of securities available-for-sale	184,564	107,525	63,321
Proceeds from maturities of securities held-to-maturity	0	995	140
Purchases of securities available-for-sale	(333,222)	(229,482)	(171,440)
Net (increase) decrease in loans	(56,935)	26,445	39,081
Purchases of premises and equipment	(4,625)	(1,935)	(1,954)
Proceeds from sales of other real property owned	3,110	6,634	1,987
Cash received related to acquisition, net of cash and cash equivalents acquired	0	180,074	0
Net cash provided by (used in) investing activities	(191,448)	100,536	(39,934)
Cash flows from financing activities:
Net increase (decrease) in deposits	(41,976)	34,745	34,056
Increase (decrease)in repurchase agreements	38,323	13,671	(322)
Repayment of long-term FHLB advances	(3,000)	(10,000)	(5,000)
Proceeds from short-term debt	8,250	0	0
Proceeds from long-term debt	0	4,000	0
Repayment of long-term debt	0	(4,000)	(13,000)
Proceeds from issuance of common stock	406	971	894
Proceeds from issuance of preferred stock	19,150	0	24,635
Purchase of treasury stock	(2,385)	(2,499)	(3,122)
Dividends paid on preferred stock	(2,990)	(2,136)	(1,242)
Dividends paid on common stock	(1,697)	(1,714)	(1,521)
Net cash provided by financing activities	14,081	33,038	35,378
Increase (decrease) in cash and cash equivalents	(158,391)	141,082	3,768
Cash and cash equivalents at beginning of year	231,493	90,411	86,643
Cash and cash equivalents at end of year	73,102	231,493	90,411
Cash paid during the year for:
Interest	8,695	10,916	16,592
Income taxes	5,470	6,848	4,596
Supplemental disclosure of noncash investing and financing activities:
Loans transferred to real estate owned	2,622	9,897	2,847
Dividends reinvested in common shares	807	680	853
Net tax benefit related to option and deferred compensation plans	$ 31	$ 158	$ 165