Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net Income	$ 6,002	$ 4,636
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	3,325	1,600
Depreciation and amortization	862	908
Net amortization on securities	2,135	1,055
Amortization of core deposit intangible	35	8
Share based compensation expense	699	512
Net securities gains	(1,993)	(135)
Increase in accrued interest receivable	(89)	(417)
Decrease (increase) in other assets	123	(59)
Increase in accrued expenses and other liabilities	665	1,918
Net cash provided by operating activities	11,764	10,026
Cash flows from investing activities:
Purchases of securities available for sale	(220,313)	(108,124)
Purchases of securities, restricted	(15,500)	(140)
Purchases of securities held to maturity	(55,097)	(38,689)
Proceeds from sales of securities available for sale	63,807	14,084
Redemption of securities, restricted	14,332	225
Maturities, calls and principal payments of securities available for sale	148,563	56,680
Maturities, calls and principal payments of securities held to maturity	50,314	33,493
Net increase in loans	(64,695)	(47,280)
Purchase of premises and equipment	(1,684)	(599)
Net cash acquired in business combination		2,309
Net cash used in investing activities	(80,273)	(88,041)
Cash flows from financing activities:
Net increase in deposits	42,339	98,411
Net decrease in federal funds purchased and FHLB overnight borrowings		(7,000)
Net increase (decrease) in FHLB term advances	15,000	(5,016)
Net decrease in repurchase agreements	(4,580)	(173)
Net proceeds from issuance of common stock	4,394	1,798
Repurchase of surrendered stock from exercise of stock options and vesting of restricted stock awards	(88)	(61)
Excess tax expense from share based compensation	(10)	(1)
Cash dividends paid	(3,875)	(2,944)
Net cash provided by financing activities	53,180	85,014
Net (decrease) increase in cash and cash equivalents	(15,329)	6,999
Cash and cash equivalents at beginning of period	79,546	22,918
Cash and cash equivalents at end of period	64,217	29,917
Cash paid for:
Interest	3,856	3,695
Income tax	1,415	820
Noncash investing and financing activities:
Securities which settled in the subsequent period	6,871
Acquisition of noncash assets and liabilities:
Fair value of assets acquired		66,566
Fair value of liabilities assumed		$ 65,059