CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 21,111	$ 13,763	$ 13,093
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	4,000	2,200	2,350
Depreciation and (accretion) amortization	(3,789)	481	1,852
Net amortization on securities	4,936	3,763	5,168
Increase in cash surrender value of bank owned life insurance	(1,225)	(609)	(35)
Amortization of intangible assets	1,447	300	59
Share based compensation expense	1,689	1,234	1,296
Net securities losses (gains)	8	1,090	(659)
Increase in accrued interest receivable	(267)	(777)	(212)
Small Business Administration ("SBA") loans originated for sale	(5,043)
Proceeds from sale of the guaranteed portion of SBA loans	5,659
Gain on sale of the guaranteed portion of SBA loans	(507)
Gain on sale of loans	(477)
(Increase) decrease in other assets	(6,815)	5,783	(1,366)
Increase (decrease) in accrued expenses and other liabilities	10,799	(1,417)	3,483
Net cash provided by operating activities	31,526	25,811	25,029
Cash flows from investing activities:
Purchases of securities available for sale	(330,646)	(342,185)	(333,359)
Purchases of securities, restricted	(318,887)	(408,439)	(164,503)
Purchases of securities held to maturity	(21,650)	(52,464)	(68,251)
Proceeds from sales of securities available for sale	75,750	360,963	129,431
Redemption of securities, restricted	308,808	408,036	160,447
Maturities, calls and principal payments of securities available for sale	113,217	80,242	130,411
Maturities, calls and principal payments of securities held to maturity	34,897	37,983	76,128
Net increase in loans	(354,375)	(235,320)	(217,668)
Proceeds from loan sale	21,011
Proceeds from sales of other real estate owned ("OREO"), net		2,942	218
Purchase of bank owned life insurance		(20,000)	(10,000)
Purchase of premises and equipment	(4,325)	(5,232)	(4,029)
Net cash acquired in business combination	24,628	2,926
Net cash used in investing activities	(451,572)	(170,548)	(301,175)
Cash flows from financing activities:
Net increase in deposits	223,872	125,300	129,773
Net increase in federal funds purchased	45,000	11,000	19,500
Net increase in FHLB advances	124,087	1,499	83,000
Repayment of acquired unsecured debt		(1,450)
Net increase (decrease) in repurchase agreements	14,628	24,893	(1,020)
Net proceeds from issuance of subordinated debentures	78,324
Net proceeds from issuance of common stock	779	631	46,237
Net proceeds from exercise of stock options	80	7	4
Repurchase of surrendered stock from exercise of stock options and vesting of restricted stock awards	(228)	(173)	(291)
Excess tax benefit from share based compensation	50	36	21
Cash dividends paid	(13,415)	(10,657)	(6,754)
Other, net	(303)	(192)
Net cash provided by financing activities	472,874	150,894	270,470
Net increase (decrease) in cash and cash equivalents	52,828	6,157	(5,676)
Cash and cash equivalents at beginning of period	51,730	45,573	51,249
Cash and cash equivalents at end of period	104,558	51,730	45,573
Cash paid for:
Interest	8,793	7,377	7,194
Income tax	8,744	4,068	5,108
Noncash investing and financing activities:
Transfers from portfolio loans to OREO	250	577	$ 2,242
Acquisition of noncash assets and liabilities:
Fair value of assets acquired	875,302	209,022
Fair value of liabilities assumed	$ 831,422	$ 213,224