Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES
Net income	$ 45,589	$ 65,095
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	12,012	11,637
Provision for credit losses	24,216	(19,914)
Loss on sale of investments	0	54
Net amortization (accretion) of investment securities and assets	2,245	(13,176)
Net amortization on borrowings	38	111
Stock-based compensation expense	4,861	3,941
Loss (gain) on sale of foreclosed assets and other real estate owned	8	(235)
Gain on sale of mortgage loans held for sale	(1,423)	(2,931)
Deferred income taxes	(179)	9,107
Income from bank owned life insurance	(3,334)	(2,706)
Originations of mortgage loans held for sale	(50,269)	(189,361)
Proceeds from sale of mortgage loans held for sale	50,934	210,442
Changes in assets and liabilities:
Interest receivable	4,117	3,633
Other assets	22,581	(19,178)
Accrued interest and other liabilities	(2,621)	(5,045)
Income taxes payable	(10,028)	9,051
Net cash provided by operating activities	98,747	60,525
INVESTING ACTIVITIES
Net change in loans	(412,077)	(22,060)
Proceeds from sale of loans	237	1,237
Net change in due from banks - time	0	25
Purchases of premises and equipment, net	(10,490)	(7,156)
Proceeds from sale of foreclosed assets and other real estate owned	289	1,623
Proceeds from maturities of available-for-sale securities	155,361	194,961
Purchases of available-for-sale securities	(745)	(162,359)
Proceeds from maturities of held-to-maturity securities	16,979	17,491
Purchases of held-to-maturity securities	(31,704)	(44,638)
Proceeds from bank owned life insurance death benefits	1,483	0
Net cash used in investing activities	(280,667)	(20,876)
FINANCING ACTIVITIES
Net change in deposits	(95,950)	25,874
Dividends paid on common stock	(25,455)	(21,375)
Net change in other borrowed funds	164,530	(730)
Net change in federal funds purchased and securities sold under agreements to repurchase	(17,541)	11,425
Net shares issued (cancelled) under stock compensation plans	(2,168)	(3,575)
Shares issued under employee stock purchase plan	833	1,151
Repurchases of common stock	0	(16,055)
Net cash provided by (used in) financing activities	24,249	(3,285)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(157,671)	36,364
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	682,122	1,650,653
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 524,451	$ 1,687,017