Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net income		$ 10,368	$ 29,127
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan losses	[1]	29,640	5,807
Depreciation and amortization of premises and equipment		2,478	2,357
Net amortization on securities		722	797
Amortization of intangible assets		834	968
Amortization of operating lease right-of use assets		1,829	1,799
Excess tax benefit on stock-based compensation		(189)	(260)
Stock-based compensation expense		2,675	2,577
Bank owned life insurance income		(1,374)	(1,377)
Proceeds from sale of loans held for sale		50,946	25,232
Originations of loans held for sale		(46,956)	(26,586)
Net gain on sale of loans held for sale		(242)	(88)
Net security losses (gains)		812	(57)
Net losses (gains) on sale of other real estate owned		11	(157)
Net change in other assets and other liabilities		(10,627)	(926)
Net cash provided by operating activities		40,927	39,213
Securities available for sale:
Proceeds from maturities, calls and principal paydowns		83,394	94,488
Proceeds from sales		0	26,203
Purchases		(88,209)	(63,579)
Securities held to maturity:
Proceeds from maturities, calls and principal paydowns		39,843	30,999
Purchases		(31,163)	(28,034)
Equity securities:
Purchases		0	(21)
Other:
Net increase in loans		(116,434)	(9,975)
Proceeds from Federal Home Loan Bank stock redemption		35,664	48,444
Purchases of Federal Home Loan Bank stock		(32,062)	(39,172)
Purchases of premises and equipment, net		(3,348)	(1,910)
Proceeds from sales of other real estate owned		80	701
Net cash (used in) provided by investing activities		(112,235)	58,144
Financing activities
Net increase in deposits		276,818	249,448
Net (decrease) in short-term borrowings		(106,371)	(326,814)
Repayments of long-term debt		(28)	(27)
Proceeds from the issuance of shares to employee and other stock plans		184	204
Cash paid by employer for tax-withholding on stock issuance		(1,166)	(1,230)
Purchase of treasury stock		(7,980)	0
Cash dividends		(23,632)	(22,774)
Net cash provided by (used in) financing activities		137,825	(101,193)
Net increase (decrease) in cash and cash equivalents		66,517	(3,836)
Cash and cash equivalents at beginning of period		216,843	180,955
Cash and cash equivalents at end of period		283,360	177,119
Cash paid during the period for:
Interest expense		12,530	13,329
Income taxes paid, net of refund		1,960	1,817
Noncash investing activities:
Loans transferred to other real estate owned		$ 1,017	$ 325

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.