Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 14,025	$ 11,372	$ 8,761
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,647	3,101	3,737
Depreciation, amortization and accretion, net	5,403	5,398	3,938
Stock-based compensation expense	227	144	52
Gains on investment securities, net	(934)	(486)	(543)
Other-than-temporary impairment (recoveries) losses recognized in earnings	(127)	886	1,418
(Gains) losses on sales of other real property owned, net	268	853	(12)
Loss on write down of fixed assets	33	2	4
Gains on sale of loans held for sale, net	(1,401)	(782)	(813)
Deferred income taxes	230	(670)	(435)
(Increase) decrease in accrued interest receivable	277	(662)	968
Decrease in accrued interest payable	(169)	(191)	(386)
Origination of loans held for sale	(99,923)	(61,375)	(63,924)
Proceeds from sale of loans held for sale	102,158	61,225	64,772
Increase in other assets	(912)	(1,900)	(5,955)
Increase (decrease) in other liabilities	1,087	2,061	(4,074)
Net cash provided by operating activities	22,889	18,976	7,508
Cash flows from investing activities:
Proceeds from maturities of certificates of deposit investments	12,982	10,000	10,605
Purchases of certificates of deposit investments	(6,416)	(13,231)	(11,261)
Proceeds from sales of securities available-for-sale	30,500	18,891	10,936
Proceeds from maturities of securities held-to-maturity	235,013	184,564	107,525
Proceeds from maturities of securities available-for-sale	51	0	995
Purchases of securities available-for-sale	(293,654)	(333,222)	(229,482)
Net (increase) decrease in loans	(54,539)	(56,935)	26,445
Purchases of premises and equipment	(1,486)	(4,625)	(1,935)
Proceeds from sales of other real property owned	3,873	3,110	6,634
Cash received related to acquisition, net of cash and cash equivalents acquired	0	0	180,074
Net cash provided by (used in) investing activities	(73,676)	(191,448)	100,536
Cash flows from financing activities:
Net increase (decrease) in deposits	103,331	(41,976)	34,745
Increase (decrease) in repurchase agreements	(18,896)	38,323	13,671
Repayment of long term FHLB advances	(14,750)	(3,000)	(10,000)
Proceeds from short-term debt	0	8,250	0
Repayment of short-term debt	(8,250)	0	0
Proceeds from long-term debt	0	0	4,000
Repayment of long-term debt	0	0	(4,000)
Proceeds from issuance of common stock	1,255	406	971
Proceeds from issuance of preferred stock	8,250	19,150	0
Purchase of treasury stock	(3,912)	(2,385)	(2,499)
Dividends paid on preferred stock	(3,788)	(2,990)	(2,136)
Dividends paid on common stock	(2,843)	(1,697)	(1,714)
Net cash provided by financing activities	60,397	14,081	33,038
Increase (decrease) in cash and cash equivalents	9,610	(158,391)	141,082
Cash and cash equivalents at beginning of period	73,102	231,493	90,411
Cash and cash equivalents at end of period	82,712	73,102	231,493
Cash paid during the period for:
Interest	6,326	8,695	10,916
Income taxes	8,203	5,470	6,848
Supplemental disclosures of noncash investing and financing activities
Loans transferred to other real estate owned	(723)	(2,622)	(9,897)
Dividends reinvested in common stock	1,244	807	680
Net tax benefit related to option and deferred compensation plans	$ 123	$ 31	$ 158