Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net income	$ 59,682	$ 54,107
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan losses	13,084	16,274
Depreciation and amortization of premises and equipment	4,732	4,644
Net amortization on securities	1,619	2,133
Amortization of intangible assets	1,861	2,010
Amortization of operating lease right-of-use assets	3,590	0
Excess tax benefit on stock-based compensation	(311)	(447)
Stock-based compensation expense	3,140	2,954
Bank owned life insurance income	(2,563)	(2,564)
Proceeds from sale of loans held for sale	65,099	49,572
Originations of loans held for sale	(73,562)	(49,243)
Net gains on sale of loans held for sale	(256)	(87)
Net security losses (gains)	12	(163)
Net gains on sale of other real estate owned	(155)	(190)
Net change in other assets and other liabilities	(14,151)	(21,825)
Net cash provided by operating activities	61,821	57,175
Investing activities
Net cash used in acquisitions	0	(7,884)
Securities available for sale:
Proceeds from maturities, calls and principal paydowns	136,764	124,873
Proceeds from sales	26,203	0
Purchases	(120,812)	(98,502)
Securities held to maturity:
Proceeds from maturities, calls and principal paydowns	88,299	45,332
Purchases	(49,482)	(105,531)
Equity securities:
Proceeds from sales	0	2,623
Purchases	(34)	0
Other:
Net increase in loans	(89,334)	(288,768)
Proceeds from Federal Home Loan Bank stock redemption	98,869	123,642
Purchases of Federal Reserve and Federal Home Loan Bank stock	(91,636)	(131,159)
Purchases of premises and equipment, net	(2,582)	(2,037)
Proceeds from sales of other real estate owned	739	1,282
Net cash used in investing activities	(3,006)	(336,129)
Financing activities
Net increase in deposits	225,495	173,813
Net (decrease) increase in short-term borrowings	(262,330)	134,874
Proceeds from issuance of long-term debt	10,598	25,000
Repayments of long-term debt	(55)	(40,091)
Proceeds from the issuance of shares to employee and other stock plans	172	881
Cash paid by employer for tax-withholdings on stock issuance	(1,440)	(1,735)
Cash dividends	(22,778)	(20,969)
Net cash (used in) provided by financing activities	(50,338)	271,773
Net increase (decrease) in cash and cash equivalents	8,477	(7,181)
Cash and cash equivalents at beginning of period	180,955	159,664
Cash and cash equivalents at end of period	189,432	152,483
Cash paid during the period for:
Interest expense	27,596	15,672
Income taxes paid, net of refund	13,074	22,890
Noncash investing activities:
Loans transferred to other real estate owned	346	912
Acquisitions:
Fair value of assets acquired	$ 0	$ 6,274