CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities
Net income	$ 199,131	$ 148,526
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for (recapture of) credit losses	32,877	1,683
Depreciation and amortization	22,667	23,845
Stock-based compensation expense	13,351	8,707
Pension expense (income)	2,634	1,590
Net amortization (accretion) on investment securities	5,565	10,544
Net (gain) loss on sales of investment securities	407	176
Unrealized gain (loss) on equity securities	(4)	1,954
Originations of loans held for sale	(219,708)	(311,143)
Net gains from sales of loans held for sale	(10,260)	(12,842)
Proceeds from sales of loans held for sale	222,454	317,852
Deferred income taxes	4,522	9,418
Operating Lease, Right-of-Use Asset, Amortization Expense	5,736	5,709
Payments for operating leases	(5,857)	(5,865)
Decrease (increase) cash surrender value of life insurance	3,882	1,559
Decrease (increase) in interest receivable	(7,724)	(6,697)
(Decrease) increase in interest payable	39,863	2,069
Decrease (increase) in other assets	52,738	(281,714)
(Decrease) increase in other liabilities	16,290	261,953
Net cash provided by (used in) operating activities	370,800	174,206
Investing activities
Proceeds from Sale of Debt Securities, Available-for-sale	4,821	116,796
Proceeds from calls, paydowns and maturities of securities available-for-sale	326,181	594,016
Payments to Acquire Debt Securities, Available-for-sale	35,718	454,759
Proceeds from calls, paydowns and maturities of securities held-to-maturity	2,937	12,790
Payments to Acquire Other Investments	4,521	37,758
Proceeds from Maturities, Prepayments and Calls of Other Investments	13,960	8
Net decrease (increase) in interest-bearing deposits with other banks	(64,685)	(124,167)
Net decrease (increase) in loans and leases	(367,240)	(490,687)
Proceeds from disposal of other real estate owned	252	170
Purchases of premises and equipment	(18,134)	(9,762)
Net change in operating leases	(45,145)	(22,574)
Proceeds from Life Insurance Policy	3,246	4,676
Net cash provided by (used in) investing activities	(187,581)	(411,251)
Financing activities
Net (decrease) increase in total deposits	214,376	(532,019)
Net (decrease) increase in short-term borrowings	(312,968)	864,844
Payments of long-term debt	6,337	55,369
Cash dividends paid on common stock	(65,504)	(65,066)
Proceeds from exercise of stock options	48	177
Net cash provided by (used in) financing activities	(170,385)	212,567
Cash and due from banks:
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	12,834	(24,478)
Cash and due from bank at beginning of period	207,501	220,031
Cash and due from bank at end of period	220,335	195,553
Supplemental Disclosures
Interest Paid	150,699	30,820
Income Taxes Paid	8,392	4,847
Noncash or Part Noncash Acquisition, Investments Acquired	0	45,494
Supplemental schedule for investing activities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets, Net Of Purchase Consideration	(3,420)	692
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(941)	(1,635)
Goodwill	4,361	(2,327)
Cash consideration	$ (3,535)	$ 0