CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flow From Operating Activities:
Net income	$ 222,089	$ 205,531	$ 148,600
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses - loans	16,755	0	58,673
Depreciation and amortization	11,815	10,701	11,009
Change in deferred taxes	9,065	6,983	(9,735)
Share-based compensation	4,652	4,762	4,600
Loans originated for sale	(251,306)	(548,742)	(591,057)
Proceeds from sales of loans held for sale	265,723	557,744	611,945
Gains on sales of loans held for sale	(4,373)	(16,223)	(15,817)
Gains on sales of securities available for sale	(1,194)	(5,674)	(11,895)
Increase in cash surrender of life insurance	(5,210)	(4,873)	(5,040)
Gains on life insurance benefits	(5,964)	(2,187)	(100)
Change in interest receivable	(20,695)	(3,239)	(5,047)
Change in interest payable	3,703	(525)	(3,467)
Other adjustments	22,985	3,124	11,162
Net cash provided by operating activities	268,045	207,382	203,831
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	348,093	(81,849)	(274,042)
Purchases of:
Securities available for sale	(451,203)	(931,368)	(613,117)
Securities held to maturity	(292,493)	(1,156,621)	(699,095)
Proceeds from sales of securities available for sale	606,873	181,333	231,391
Proceeds from maturities of:
Securities available for sale	201,846	279,367	322,617
Securities held to maturity	154,689	227,255	273,229
Change in Federal Home Loan Bank stock	1,899	0	0
Net change in loans	(1,165,548)	(60,581)	(792,986)
Net cash and cash equivalents received (paid) in acquisition	137,780	(2,933)	0
Proceeds from the sale of other real estate owned	496	706	8,655
Proceeds from life insurance benefits	24,047	8,764	601
Proceeds from mortgage portfolio loan sale	0	78,159	0
Other adjustments	(12,920)	(11,678)	(9,278)
Net cash used in investing activities	(446,441)	(1,469,446)	(1,552,025)
Net change in :
Demand and savings deposits	(513,496)	1,556,127	2,336,120
Certificates of deposit and other time deposits	232,874	(185,160)	(814,466)
Borrowings	1,818,389	45,542	573,757
Repayment of borrowings	(1,332,889)	(96,204)	(621,548)
Cash dividends on preferred stock	(1,406)	0	0
Cash dividends on common stock	(72,748)	(61,230)	(56,542)
Stock issued under employee benefit plans	706	605	639
Stock issued under dividend reinvestment and stock purchase plans	2,056	1,880	1,726
Stock options exercised	358	198	115
Repurchase of common stock	0	(25,444)	(55,912)
Net cash provided by financing activities	133,844	1,236,314	1,363,889
Net Change in Cash and Cash Equivalents	(44,552)	(25,750)	15,695
Cash and Cash Equivalents, January 1	167,146	192,896	177,201
Cash and Cash Equivalents, December 31	122,594	167,146	192,896
Additional cash flow information:
Interest paid	80,035	36,477	69,848
Income tax paid	13,819	31,168	33,201
Loans transferred to other real estate owned	6,469	292	813
Fixed assets transferred to other real estate owned	1,490	6,384	262
Non-cash investing activities using trade date accounting	46,106	39,923	6,183
ROU assets obtained in exchange for new operating lease liabilities	10,516	2,700	1,601
Fair value of assets acquired	2,510,576	4,041	0
Cash paid in acquisition	(79,324)	(3,225)	0
Liabilities assumed	2,168,863	816	0
Common Stock
Additional cash flow information:
Less: common stock and preferred stock issued	237,389	0	0
Preferred Stock
Additional cash flow information:
Less: common stock and preferred stock issued	$ 25,000	$ 0	$ 0