CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 51,396	$ 37,943
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	750	2,400
Depreciation of premises and equipment	2,454	2,613
Net amortization of premium and discount	2,157	2,560
Amortization of intangibles	740	787
Goodwill impairment	0	150
Share-based compensation	1,977	1,872
Tax benefit from stock option exercises and other equity awards	454	414
Income from bank-owned life insurance	(1,624)	(1,624)
Net gains on loan sales and commissions on loans originated for others, including fair value adjustments	(7,950)	(8,004)
Proceeds from sales of loans	306,095	345,539
Loans originated for sale	(296,367)	(337,772)
Change in fair value of contingent consideration liability	0	(310)
(Increase) decrease in other assets	(20,903)	(9,548)
Increase (decrease) in other liabilities	19,256	6,537
Net cash provided by (used in) operating activities	58,435	43,557
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(96,867)	(35,213)
Purchases of other investment securities available for sale	(30,964)	(19,963)
Maturities and principal payments of mortgage-backed securities available for sale	63,918	62,745
Maturities and principal payments of other investment securities available for sale	6,795	21,269
Maturities and principal payments of mortgage-backed securities held to maturity	1,603	2,283
Remittance (purchases) of Federal Home Loan Bank stock	(4,008)	956
Net (increase) decrease in loans	(181,853)	(88,914)
Purchases of loans	(1,750)	(737)
Proceeds from the sale of property acquired through foreclosure or repossession	49	513
Purchases of premises and equipment	(2,320)	(2,184)
Purchases of bank-owned life insurance	(5,000)	0
Net cash provided by (used in) investing activities	(250,397)	(59,245)
Cash flows from financing activities:
Net increase (decrease) in deposits	171,641	93,329
Proceeds from Federal Home Loan Bank advances	1,462,500	1,000,000
Repayment of Federal Home Loan Bank advances	(1,425,464)	(1,034,885)
Payment for contingent consideration liability	(1,217)	0
Net proceeds from stock option exercises and issuance of other equity awards	(714)	194
Cash dividends paid	(21,856)	(19,567)
Net cash provided by (used in) financing activities	184,890	39,071
Net increase (decrease) in cash and cash equivalents	(7,072)	23,383
Cash and cash equivalents at beginning of period	82,923	107,797
Cash and cash equivalents at end of period	75,851	131,180
Noncash Investing and Financing Activities:
Loans charged off	889	1,415
Loans transferred to property acquired through foreclosure or repossession	3,074	576
Supplemental Disclosures:
Interest payments	28,596	21,512
Income tax payments	$ 12,585	$ 19,272