CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net income	$ 66,818	$ 57,719
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	8,800	(5,747)
Depreciation, amortization and accretion, net	10,827	15,581
Deferred income tax provision	4,330	15,059
Stock-based compensation	2,320	3,135
Other losses	1,223	1,566
Originations of loans held for sale	(1,468)	(6,566)
Proceeds from sales of loans held for sale	1,447	6,194
Change in assets and liabilities:
Net increase in other assets	(9,536)	(33,509)
Net (decrease) increase in other liabilities	(2,128)	12,830
Net cash provided by operating activities	82,633	66,262
Available-for-sale securities:
Proceeds from maturities and principal repayments	119,692	383,290
Proceeds from calls and sales		970
Purchases		(563,925)
Held-to-maturity securities:
Proceeds from maturities and principal repayments	68,854
Proceeds from calls	220
Other investments:
Proceeds from sales	13,984	2,690
Purchases	(42,251)	(2,841)
Loans:
Net (increase) decrease in loans and leases resulting from originations and principal repayments	(88,408)	180,505
Purchases of loans	(48,741)	(114,677)
Proceeds from bank-owned life insurance	4,932
Purchases of premises, equipment and software	(1,555)	(2,695)
Proceeds from sales of other real estate owned		176
Other	(1,614)
Net cash provided by (used in) investing activities	25,113	(116,507)
Cash flows from financing activities
Net (decrease) increase in deposits	(407,529)	454,284
Net increase in short-term borrowings	175,000
Proceeds from long-term borrowings	500,000
Dividends paid	(33,114)	(33,151)
Stock tendered for payment of withholding taxes	(3,135)	(3,197)
Net cash provided by financing activities	231,222	417,936
Net increase in cash and cash equivalents	338,968	367,691
Cash and cash equivalents at beginning of period	526,624	1,258,469
Cash and cash equivalents at end of period	865,592	1,626,160
Supplemental disclosures
Interest paid	40,937	3,545
Income taxes paid, net of income tax refunds	1,761	2,124
Noncash investing and financing activities:
Operating lease right-of-use assets obtained in exchange for new lease obligations	$ 1,306	761
Transfers to loans and leases from loans held for sale		$ (834)