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	$ 12,653	$ 5,341	$ 5,092
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization, net of accretion	9,950	6,028	4,235
Valuation adjustment on foreclosed assets	1,416	2,759	895
Capitalized other real estate owned costs	(140)	(780)
(Gain) loss on sale of other real estate owned	(130)	127	31
Provision for loan losses	1,900	12,900	15,000
Deferred income taxes	(314)	1,423	(2,110)
Increase in cash surrender value of bank-owned life insurance	(583)	(38)
Share-based compensation	875	659	911
Vested RSUs surrendered by employees to cover tax consequence	(105)
Excess tax benefit of stock options exercised	(10)	(14)	(11)
Production of mortgage loans held-for-sale	(2,259)	(8,153)	(14,352)
Proceeds from the sale of mortgage loans held-for-sale	3,317	9,211	12,981
Other than temporary impairment on investment securities		10	226
Gain on sale of investment securities		(884)	(45)
Change in:
Interest receivable	205	(354)	37
Deferred loan fees	163	94	(935)
Accrued interest payable and other liabilities	2,092	366	(1,239)
Income taxes (receivable) payable	1,671	(1,671)	5,299
Other assets		1,014	2,344
Net cash provided by operating activities	30,701	28,038	28,359
Cash flows from investing activities:
Proceeds from maturities, paydowns and sales of available-for-sale investment securities	100,657	99,866	47,779
Purchase of available-for-sale investment securities	(148,614)	(192,365)	(134,485)
Net loan principal collections (originations)	(64,169)	12,581	62,755
Purchase of loans			(40)
Purchase of property and equipment	(522)	(524)	(2,131)
Proceeds on sale of foreclosed assets	5,128	10,216	3,407
Purchase of energy tax credits	(14)		(1,318)
Purchase of bank-owned life insurance		(15,000)
Redemption of FHLB Stock	190
Net cash used by investing activities	(107,344)	(85,226)	(24,033)
Cash flows from financing activities:
Increase in deposits	80,900	6,295	131,041
Increase (decrease) in federal funds purchased and FHLB short-term borrowings	29,770	56,800	(115,525)
Proceeds from FHLB term advances originated	39,000		3,500
FHLB advances paid-off	(53,000)	(10,000)	(14,000)
Proceeds from stock options exercised	69	89	104
Excess tax benefit of stock options exercised	10	14	11
Dividends paid	(5,588)	(1,842)	(736)
Repurchase of Common stock	(5,676)
Net cash provided by (used in) financing activities	85,485	51,356	4,395
Net increase (decrease) in cash and cash equivalents	8,842	(5,832)	8,721
Cash and cash equivalents, beginning of year	19,859	25,691	16,970
Cash and cash equivalents, end of year	28,701	19,859	25,691
Noncash investing and financing activities:
Transfers of loans to other real estate owned	13,246	9,029	14,402
Change in fair value of securities, net of deferred income taxes	3,672	2,347	1,474
Cash paid during the year for:
Income taxes	4,187	1,694	4,769
Interest	$ 5,710	$ 8,292	$ 12,136