CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 34,768	$ 33,885
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,175	400
Depreciation of premises and equipment	1,672	1,630
Net amortization of premium and discount	1,894	1,386
Amortization of intangibles	478	495
Share-based compensation	1,503	1,319
Tax benefit from stock option exercises and other equity awards	172	352
Income from bank-owned life insurance	(1,215)	(1,052)
Net gains on loan sales and commissions on loans originated for others, including fair value adjustments	(5,998)	(5,465)
Net realized losses on securities	(80)	0
Proceeds from sales of loans	199,897	182,964
Loans originated for sale	(213,247)	(188,185)
(Increase) decrease in operating lease right-of-use assets	748	0
Increase (decrease) in operating lease liabilities	(643)	0
(Increase) decrease in other assets	(26,368)	(16,777)
Increase (decrease) in other liabilities	23,781	11,815
Net cash provided by (used in) operating activities	18,697	22,767
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(72,262)	(61,619)
Purchases of other investment securities available for sale	(10,507)	(1,064)
Proceeds from sale of other investment securities available for sale	9,920	0
Maturities and principal payments of mortgage-backed securities available for sale	51,590	41,270
Maturities and principal payments of other investment securities available for sale	11,045	6,795
Maturities and principal payments of mortgage-backed securities held to maturity	0	1,077
Remittance (purchases) of Federal Home Loan Bank stock	(3,691)	(5,764)
Net (increase) decrease in loans	(50,729)	(115,986)
Purchases of loans	(161)	(1,676)
Purchases of premises and equipment	(1,971)	(1,675)
Purchases of bank-owned life insurance	0	5,000
Proceeds from surrender of bank-owned life insurance	326	0
Net cash provided by (used in) investing activities	(66,440)	(143,642)
Cash flows from financing activities:
Net increase (decrease) in deposits	(19,426)	78,904
Proceeds from Federal Home Loan Bank advances	1,022,000	1,135,000
Repayment of Federal Home Loan Bank advances	(911,762)	(1,025,303)
Payment of contingent consideration liability	0	(1,217)
Net proceeds from stock option exercises and issuance of other equity awards	(274)	(394)
Cash dividends paid	(16,456)	(14,346)
Net cash provided by (used in) financing activities	74,082	172,644
Net increase (decrease) in cash and cash equivalents	26,339	51,769
Cash and cash equivalents at beginning of period	93,475	82,923
Cash and cash equivalents at end of period	119,814	134,692
Noncash Investing and Financing Activities:
Loans charged off	922	793
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	30,341	17,576
Income tax payments	$ 9,786	$ 8,570