Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net income	$ 76,901	$ 80,142
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan losses	4,986	(8,012)
Depreciation and amortization of premises and equipment	5,003	4,921
Net amortization on securities	1,927	3,049
Amortization of intangible assets	1,181	1,494
Amortization of operating lease right-of-use assets	3,341	3,613
Excess tax benefit on stock-based compensation	(176)	(322)
Stock-based compensation expense	3,279	3,256
Bank owned life insurance income	(3,065)	(3,040)
Amortization of subordinated debt issuance costs	218	219
Proceeds from sale of loans held for sale	2,728	28,667
Originations of loans held for sale	(2,139)	(28,792)
Net gains on sale of loans held for sale	(78)	(160)
Net security losses (gains)	766	(668)
Net gains on sale of other real estate owned	(259)	(19)
Net change in other assets and other liabilities	8,127	11,339
Net cash provided by operating activities	102,740	95,687
Investing activities
Net cash used in acquisitions	(477)	0
Securities available for sale:
Proceeds from maturities, calls and principal paydowns	133,012	216,468
Purchases	(201,985)	(418,915)
Securities held to maturity:
Proceeds from maturities, calls and principal paydowns	109,956	110,328
Purchases	(313,825)	(116,360)
Equity securities:
Proceeds from calls	0	1,000
Other:
Net increase in loans	(282,417)	(22,270)
Proceeds from Federal Home Loan Bank stock redemption	572	2,352
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	(367)	(131)
Proceeds from settlement of bank owned life insurance	913	2,967
Purchases of bank owned life insurance	0	(40,000)
Purchases of premises and equipment, net	(2,267)	(3,138)
Proceeds from sales of other real estate owned	426	719
Net cash used in investing activities	(556,459)	(266,980)
Financing activities
Net (decrease) increase in deposits	(205,761)	703,565
Net decrease in short-term borrowings	(35,250)	(77,788)
Repayments of long-term debt	(10,648)	(25,052)
Proceeds from the issuance of shares to employee and other stock plans	0	112
Cash paid by employer for tax-withholdings on stock issuance	(1,289)	(1,935)
Purchase of treasury stock	(14,713)	(9,871)
Cash dividends	(24,075)	(23,476)
Net cash (used in) provided by financing activities	(291,736)	565,555
Net (decrease) increase in cash and cash equivalents	(745,455)	394,262
Cash and cash equivalents at beginning of period	1,269,071	672,681
Cash and cash equivalents at end of period	523,616	1,066,943
Cash paid during the period for:
Interest expense	8,452	11,350
Income taxes paid, net of refund	24,203	28,004
Noncash investing activities:
Loans transferred to other real estate owned	0	40
Acquisitions:
Fair value of assets acquired	$ 429	$ 0