CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 13,093	$ 12,772	$ 10,359
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,350	5,000	3,900
Depreciation and amortization	2,047	1,762	1,843
Net amortization on securities	5,168	5,573	2,400
Amortization of core deposit intangible	59	67	42
Share based compensation expense	1,296	1,343	1,047
Net securities gains	(659)	(2,647)	(135)
Increase in accrued interest receivable	(212)	(496)	(787)
(Increase) decrease in other assets	(11,401)	(2,287)	1,593
Increase (decrease) in accrued expenses and other liabilities	3,483	1,737	(1,582)
Net cash provided by operating activities	15,224	22,824	18,680
Cash flows from investing activities:
Purchases of securities available for sale	(333,359)	(511,979)	(302,760)
Purchases of securities, restricted	(164,503)	(31,355)	(315)
Purchases of securities held to maturity	(68,251)	(132,304)	(83,911)
Proceeds from sales of securities available for sale	129,431	151,959	14,084
Redemption of securities, restricted	160,447	30,037	225
Maturities, calls and principal payments of securities available for sale	130,411	266,095	196,886
Maturities, calls and principal payments of securities held to maturity	76,128	89,123	61,844
Net increase in loans	(217,847)	(186,226)	(73,029)
Proceeds from loan sale		575
Proceeds from sales of other real estate owned ("OREO"), net	218
Purchase of premises and equipment	(4,029)	(3,592)	(2,031)
Net cash acquired in business combination			2,309
Net cash used in investing activities	(291,354)	(327,667)	(186,698)
Cash flows from financing activities:
Net increase in deposits	129,757	221,137	214,252
Net increase (decrease) in federal funds purchased and FHLB overnight borrowings	77,500	44,500	(7,000)
Net increase (decrease) of FHLB term advances	25,000	15,000	(5,016)
Net (decrease) increase in repurchase agreements	(1,020)	(4,507)	527
Net proceeds from issuance of common stock	46,237	10,507	28,088
Net proceeds from exercise of stock options	4
Repurchase of surrendered stock from exercise of stock options and vesting of restricted stock awards	(291)	(175)	(128)
Excess tax (expense) benefit from share based compensation	21	(18)	(16)
Cash dividends paid	(6,754)	(9,898)	(6,061)
Net cash provided by financing activities	270,454	276,546	224,646
Net (decrease) increase in cash and cash equivalents	(5,676)	(28,297)	56,628
Cash and cash equivalents at beginning of period	51,249	79,546	22,918
Cash and cash equivalents at end of period	45,573	51,249	79,546
Cash paid for:
Interest	7,194	7,727	7,730
Income tax	5,108	5,260	4,550
Noncash investing and financing activities:
Transfers from portfolio loans to loans held for sale			2,300
Financing of sale of loans held for sale		1,725
Transfers from portfolio loans to OREO	2,242	250
Acquisition of noncash assets and liabilities:
Fair value of assets acquired			66,566
Fair value of liabilities assumed			$ 65,059