CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 16,211	$ 11,782
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	0	400
Depreciation of premises and equipment	827	901
Net amortization of premium and discount	695	893
Amortization of intangibles	248	277
Share-based compensation	669	607
Tax benefit from stock option exercises and other equity awards	207	195
Income from bank-owned life insurance	(515)	(536)
Net gains on loan sales and commissions on loans originated for others, including fair value adjustments	(2,679)	(2,269)
Proceeds from sales of loans	89,575	92,325
Loans originated for sale	(79,212)	(86,133)
Change in fair value of contingent consideration liability	0	(310)
(Increase) decrease in other assets	(10,973)	(724)
Increase (decrease) in other liabilities	6,483	(530)
Net cash provided by (used in) operating activities	21,536	16,878
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(40,657)	(20,248)
Purchases of other investment securities available for sale	(1,064)	(19,963)
Maturities and principal payments of mortgage-backed securities available for sale	20,100	19,483
Maturities and principal payments of other investment securities available for sale	500	5,875
Maturities and principal payments of mortgage-backed securities held to maturity	540	871
Remittance (purchases) of Federal Home Loan Bank stock	(610)	(585)
Net decrease (increase) in loans	(15,571)	9,070
Purchases of loans	(1,520)	0
Purchases of premises and equipment	(811)	(733)
Net cash provided by (used in) investing activities	(39,093)	(6,230)
Cash flows from financing activities:
Net increase (decrease) in deposits	13,727	51,819
Proceeds from Federal Home Loan Bank advances	515,000	175,000
Repayment of Federal Home Loan Bank advances	(497,679)	(225,189)
Payment for contingent consideration liability	(1,217)	0
Net proceeds from stock option exercises and issuance of other equity awards	(456)	277
Cash dividends paid	(6,739)	(6,372)
Net cash provided by (used in) financing activities	22,636	(4,465)
Net increase (decrease) in cash and cash equivalents	5,079	6,183
Cash and cash equivalents at beginning of period	82,923	107,797
Cash and cash equivalents at end of period	88,002	113,980
Noncash Investing and Financing Activities:
Loans charged off	690	79
Loans transferred to property acquired through foreclosure or repossession	3,074	410
Supplemental Disclosures:
Interest payments	8,047	6,985
Income tax payments	$ 908	$ 566