CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flow From Operating Activities:
Net income	$ 223,786	$ 222,089	$ 205,531
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	3,500	16,755	0
Depreciation and amortization	11,711	11,815	10,701
Change in deferred taxes	6,599	9,065	6,983
Share-based compensation	5,158	4,652	4,762
Loans originated for sale	(793,125)	(251,306)	(548,742)
Proceeds from sales of loans held for sale	791,764	265,723	557,744
Gains on sales of loans held for sale	(8,479)	(4,373)	(16,223)
Net (gains) losses on sales of securities available for sale	6,930	(1,194)	(5,674)
Increase in cash surrender of life insurance	(5,320)	(5,210)	(4,873)
Gains on life insurance benefits	(3,027)	(5,964)	(2,187)
Change in interest receivable	(12,594)	(20,695)	(3,239)
Change in interest payable	11,382	3,703	(525)
Operating lease right-of-use abandonment	2,083	0	0
Other adjustments	18,465	39,229	11,083
Net cash provided by operating activities	258,833	284,289	215,341
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	(310,019)	348,093	(81,849)
Purchases of:
Securities available for sale	(32,852)	(451,203)	(931,368)
Securities held to maturity	(5,653)	(292,493)	(1,156,621)
Proceeds from sales of securities available for sale	388,254	606,873	181,333
Proceeds from maturities of:
Securities available for sale	56,182	201,846	279,367
Securities held to maturity	104,865	154,689	227,255
Change in Federal Home Loan Bank stock	(3,244)	1,899	0
Payment of capital calls to qualified affordable housing investments	(11,685)	(11,589)	(2,235)
Net change in loans	(621,786)	(1,165,548)	(60,581)
Net cash and cash equivalents received (paid) in acquisition	0	137,780	(2,933)
Proceeds from the sale of other real estate owned	1,748	496	706
Proceeds from life insurance benefits	10,357	24,047	8,764
Other adjustments	(33,905)	(17,575)	(17,402)
Net cash used in investing activities	(344,425)	(462,685)	(1,477,405)
Net change in :
Demand and savings deposits	(623,642)	(513,496)	1,556,127
Certificates of deposit and other time deposits	1,062,350	232,874	(185,160)
Borrowings	834,031	1,818,389	45,542
Repayment of borrowings	(1,119,200)	(1,332,889)	(96,204)
Cash dividends on preferred stock	(1,875)	(1,406)	0
Cash dividends on common stock	(80,061)	(72,748)	(61,230)
Stock issued under employee benefit plans	754	706	605
Stock issued under dividend reinvestment and stock purchase plans	2,180	2,056	1,880
Stock options exercised	1,110	358	198
Repurchase of common stock	0	0	(25,444)
Net cash provided by financing activities	75,647	133,844	1,236,314
Net Change in Cash and Cash Equivalents	(9,945)	(44,552)	(25,750)
Cash and Cash Equivalents, January 1	122,594	167,146	192,896
Cash and Cash Equivalents, December 31	112,649	122,594	167,146
Additional cash flow information:
Interest paid	337,104	80,035	36,477
Income tax paid	34,838	13,819	31,168
Loans transferred to other real estate owned	1,224	6,469	292
Fixed assets transferred to other real estate owned	5,020	1,490	6,384
Non-cash investing activities using trade date accounting	3,273	46,106	39,923
ROU assets obtained in exchange for new operating lease liabilities	2,253	10,516	2,700
Qualified affordable housing investments obtained in exchange for funding commitments	44,200	36,500	21,000
Fair value of assets acquired	0	2,510,576	4,041
Cash paid in acquisition	0	(79,324)	(3,225)
Liabilities assumed	0	2,168,863	816
Commercial
Proceeds from maturities of:
Proceeds from portfolio loan sale	113,313	0	0
Mortgage Portfolio Segment
Proceeds from maturities of:
Proceeds from portfolio loan sale	0	0	78,159
Common Stock
Additional cash flow information:
Less: common stock and preferred stock issued	0	237,389	0
Preferred Stock
Additional cash flow information:
Less: common stock and preferred stock issued	$ 0	$ 25,000	$ 0