Consolidated Statements Of Cash Flows	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Operating Activities
Net income	$ 40,067,000	$ 20,952,000	$ 24,570,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	5,258,000	1,936,000	2,220,000
Depreciation and amortization expense	4,426,000	3,614,000	3,051,000
Purchase accounting accretion, net	(5,048,000)	(367,000)	(554,000)
Investment securities amortization and accretion, net	3,135,000	2,244,000	1,784,000
Stock-based compensation expense	1,997,000	836,000	599,000
Amortization of intangible assets	1,903,000	1,306,000	1,148,000
Net gains on sale of securities	(51,000)	(4,000)	(451,000)
Net increase in other real estate owned valuation allowance and (gain) loss on disposition	35,000	362,000	215,000
Originations of mortgage loans held for sale	(236,450,000)	(72,032,000)	(799,000)
Proceeds from the sale of mortgage loans	238,351,000	62,485,000	830,000
Gain on sale of mortgage loans, net of origination costs	(6,201,000)	(1,278,000)	(31,000)
Cost of fixed assets disposals associated with the SBM acquisition	0	1,130,000	0
Goodwill impairment	0	0	0
(Increase) decrease in other assets	11,329,000	(7,062,000)	(3,349,000)
Increase (decrease) in other liabilities	(1,333,000)	1,796,000	653,000
Net cash provided by operating activities	57,418,000	15,918,000	29,886,000
Investing Activities
Cash received in SBM acquisition, net of cash paid	0	59,917,000	0
Proceeds from sales and maturities of available-for-sale securities	184,564,000	156,434,000	134,358,000
Purchase of available-for-sale securities	(220,169,000)	(111,170,000)	(78,355,000)
Purchase of securities held-to-maturity	(10,986,000)	(64,355,000)	(20,338,000)
Net increase in loans	(103,699,000)	(94,811,000)	(196,670,000)
Proceeds from sale of premises and equipment	90,000	0	0
Purchase of premises and equipment	(1,671,000)	(3,189,000)	(1,316,000)
Purchase of Federal Home Loan Bank and Federal Reserve Bank stock	(7,342,000)	(1,594,000)	(718,000)
Proceeds from sale of other real estate owned	5,652,000	471,000	51,000
Proceeds from sale of other real estate owned	730,000	2,825,000	1,730,000
Recoveries of previously charged-off loans	486,000	728,000	746,000
Purchase of bank-owned life insurance, net of death benefit proceeds	(15,608,000)	0	(10,000,000)
Net cash used in investing activities	(167,953,000)	(54,744,000)	(170,512,000)
Financing Activities
Net increase in deposits	103,027,000	71,825,000	118,435,000
Net increase (decrease) in other borrowed funds	77,227,000	(18,105,000)	46,954,000
Repayments on Federal Home Loan Bank long-term advances	(25,000,000)	(11,039,000)	(60,073,000)
Proceeds from Federal Home Loan Bank long-term advances	0	10,000,000	60,000,000
Repayments of Other Debt	(25,000,000)	0	0
Issuance of subordinated debt, net of costs	0	14,464,000	0
Common stock repurchases	0	0	(7,475,000)
Equity issuance costs	0	(612,000)	0
Exercise of stock options and issuance of restricted stock, net of repurchase for tax withholdings and tax benefit	(894,000)	(753,000)	(328,000)
Cash dividends paid on common stock and cash in lieu for fractional shares paid due to stock split	(12,394,000)	(9,785,000)	(8,085,000)
Net cash provided by financing activities	118,754,000	57,501,000	150,084,000
Net increase in cash and cash equivalents	8,219,000	18,675,000	9,458,000
Cash and cash equivalents at beginning of year	79,488,000	60,813,000	51,355,000
Cash and cash equivalents at end of year	87,707,000	79,488,000	60,813,000
Supplemental information
Interest paid	16,661,000	12,588,000	12,158,000
Income taxes paid	10,647,000	12,205,000	13,365,000
Transfer of loans and premises to other real estate owned	383,000	2,175,000	1,337,000
Measurement-period adjustments	960,000	0	0
Assets acquired in SBM acquisition, excluding net cash received (not adjusted for measurement-period adjustments)	0	729,283,000	0
Liabilities assumed in SBM acquisition (not adjusted for measurement-period adjustments)	0	729,500,000	0
Common stock and stock options issued for SBM acquisition	$ 0	$ 110,551,000	$ 0