CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 43,089	$ 52,814
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,831	6,801
Provision (benefit) for credit losses	3,245	(648)
Net amortization of premium on securities	19,352	8,991
Securities (gains) losses, net	(2,872)	30
Unrealized gain on equity securities, net	283	110
Stock based compensation	2,704	2,760
Loans originated for sale	(99,331)	(124,380)
Proceeds on sales of loans held for sale	101,260	145,200
Net gains on sale of loans held for sale	(2,974)	(5,908)
Decrease in accrued interest receivable	6,282	26
Increase in prepaid expenses	(4,765)	(578)
Increase (decrease) in accrued interest payable	(100)	236
Capitalization of servicing rights	(437)	(512)
Valuation adjustment on servicing rights	(1,658)	(917)
Loss on sales/valuations of assets, net	46	194
Net excess tax benefit from stock based compensation	172	153
Other, net	12,652	(17,816)
NET CASH PROVIDED BY OPERATING ACTIVITIES	83,779	66,556
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of time deposits in other financial institutions	0	(9)
Proceeds from the sale of securities available for sale	824,071	207,067
Proceeds from the sale of securities held to maturity	2,337	0
Proceeds from the maturity of and principal paydowns on securities available for sale	290,347	159,773
Proceeds from the maturity of and principal paydowns on securities held to maturity	1,067	3,909
Proceeds from the sale, maturity of, redemption of and principal paydowns on other investments	1,982	1,003
Purchase of securities available for sale	(1,007,992)	(709,690)
Purchase of other investments	(1,385)	(685)
Net increase in loans	(235,696)	(29,674)
Purchase of bank owned life insurance policies	(5)	(22)
Capital expenditures	(2,544)	(3,776)
Proceeds from the sale of equipment	214	1,311
Proceeds on sale of OREO and other repossessed assets	1,157	1,209
NET CASH USED BY INVESTING ACTIVITIES	(126,447)	(369,584)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in demand deposits	(119,077)	487,136
Net increase in savings deposits	338,518	159,547
Net increase (decrease) in time deposit accounts	29,988	(67,537)
Net decrease in short-term borrowings	(24,225)	(27,275)
Repayments of other borrowings	(79)	(107,807)
Proceeds from issuance of common stock	274	196
Dividends paid	(13,428)	(11,273)
NET CASH PROVIDED BY FINANCING ACTIVITIES	211,971	432,987
Net increase in cash and cash equivalents	169,303	129,959
Cash and cash equivalents at beginning of year	435,599	337,903	$ 337,903
CASH AND CASH EQUIVALENTS AT END OF PERIOD	604,902	467,862	$ 435,599
Supplemental disclosures:
Cash paid for income/franchise taxes	32	15,744
Cash paid for interest	6,683	7,611
Loans transferred to OREO	653	585
Transfer of premises from premises, furniture and equipment, net, to premises, furniture and equipment held for sale	3,250	1,140
Transfer of premises from premises, furniture and equipment held for sale to premises, furniture and equipment, net	0	6
Dividends declared, not paid	$ 2,013	$ 2,013