CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 17,495	$ 16,211
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	650	0
Depreciation of premises and equipment	838	827
Net amortization of premium and discount	822	695
Amortization of intangibles	239	248
Share-based compensation	740	669
Tax benefit from stock option exercises and other equity awards	7	207
Income from bank-owned life insurance	(649)	(515)
Net gains on loan sales and commissions on loans originated for others, including fair value adjustments	(2,474)	(2,679)
Proceeds from sales of loans	51,673	89,575
Loans originated for sale	(46,864)	(79,212)
(Increase) decrease in operating lease right-of-use assets	673	0
Increase (decrease) in operating lease liabilities	(666)	0
(Increase) decrease in other assets	(11,022)	(10,973)
Increase (decrease) in other liabilities	9,532	6,483
Net cash provided by (used in) operating activities	20,994	21,536
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(62,109)	(40,657)
Purchases of other investment securities available for sale	(10,507)	(1,064)
Maturities and principal payments of mortgage-backed securities available for sale	19,718	20,100
Maturities and principal payments of other investment securities available for sale	10,000	500
Maturities and principal payments of mortgage-backed securities held to maturity	0	540
Remittance (purchases) of Federal Home Loan Bank stock	(1,957)	(610)
Net (increase) decrease in loans	(54,147)	(15,571)
Purchases of loans	(161)	(1,520)
Purchases of premises and equipment	(1,655)	(811)
Proceeds from surrender of bank-owned life insurance	326	0
Net cash provided by (used in) investing activities	(100,492)	(39,093)
Cash flows from financing activities:
Net increase (decrease) in deposits	(19,788)	13,727
Proceeds from Federal Home Loan Bank advances	532,000	515,000
Repayment of Federal Home Loan Bank advances	(426,593)	(497,679)
Payment of contingent consideration liability	0	(1,217)
Net proceeds from stock option exercises and issuance of other equity awards	116	(456)
Cash dividends paid	(8,153)	(6,739)
Net cash provided by (used in) financing activities	77,582	22,636
Net increase (decrease) in cash and cash equivalents	(1,916)	5,079
Cash and cash equivalents at beginning of period	93,475	82,923
Cash and cash equivalents at end of period	91,559	88,002
Noncash Investing and Financing Activities:
Loans charged off	103	690
Loans transferred to property acquired through foreclosure or repossession	0	3,074
Operating lease right-of-use assets	28,923	0
Operating lease liabilities	30,853	0
Fair value of debt securities transferred from held-to-maturity to available for sale	10,316	0
Supplemental Disclosures:
Interest payments	14,082	8,047
Income tax payments	$ 1,136	$ 908