CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows Provided by (Used in) Operating Activities
Net income	$ 58,263	$ 67,582
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	1,400	(8,496)
Amortization of intangible assets	5,962	5,051
Amortization of mortgage servicing rights	1,901	2,961
Amortization of NMTC	3,003	3,068
Depreciation and amortization of premises and equipment	5,438	5,709
Net amortization (accretion) on portfolio loans	1,140	(5,757)
Net amortization (accretion) of premium (discount) on investment securities	11,069	10,460
Net amortization (accretion) of premium (discount) on time deposits	(227)	(550)
Net amortization (accretion) of premium (discount) on FHLB advances and other borrowings	577	416
Impairment of OREO and other repossessed assets	611
Impairment of fixed assets held for sale	100
Impairment of mortgage servicing rights	(9)	(506)
Impairment of leases	84
Unrealized (gains) losses recognized on equity securities	2,454	(2,420)
(Gain) loss on sales of equity securities, net	(24)
(Gain) loss on sales of debt securities, net	(102)	(119)
(Gain) loss on sales of loans, net	(1,451)	(6,133)
(Gain) loss on sales of OREO	39	161
(Gain) loss on sales of premises and equipment	(679)	(986)
(Gain) loss on life insurance proceeds		(488)
(Increase) decrease in cash surrender value of bank owned life insurance	(1,758)	(1,953)
Provision for deferred income taxes	(2)	3,804
Stock-based compensation	4,245	3,885
Mortgage loans originated for sale	(47,305)	(157,670)
Proceeds from sales of mortgage loans	67,586	188,216
Net change in operating assets and liabilities:
(Increase) decrease in other assets	(30,313)	(12,063)
Increase (decrease) in other liabilities	(8,320)	(14,260)
Net cash provided by (used in) operating activities	73,682	79,912
Cash Flows Provided by (Used in) Investing Activities
Purchases of equity securities	(5,948)	(5,998)
Purchases of debt securities available for sale	(279,831)	(1,274,797)
Proceeds from sales of equity securities	6,546	1,235
Proceeds from sales of debt securities available for sale		290,955
Proceeds from paydowns and maturities of debt securities held to maturity	33,894
Proceeds from paydowns and maturities of debt securities available for sale	273,524	424,725
Net cash received in (paid for) acquisitions (see Note 2)		236,981
Net (increase) decrease in loans	(310,582)	81,441
Cash paid for premiums on bank-owned life insurance	(96)	(113)
Proceeds from life insurance	219	3,227
Purchases of premises and equipment	(2,672)	(3,093)
Proceeds from disposition of premises and equipment	3,068	5,158
Proceeds from sales of OREO	2,469	1,410
Net cash provided by (used in) investing activities	(279,409)	(238,869)
Cash Flows Provided by (Used in) Financing Activities
Net increase (decrease) in deposits	(371,122)	335,422
Net change in federal funds purchased and securities sold under agreements to repurchase	(41,756)	15,001
Proceeds from FHLB advances		5,000
Repayment of FHLB advances	(5,336)	(4,327)
Proceeds from other borrowings, net of debt issuance costs	98,094	72,500
Repayment of other borrowings	(46,000)
Cash dividends paid	(25,452)	(24,997)
Purchase of treasury stock	(6,824)	(7,248)
Cash paid for withholding taxes on stock-based payments	(849)
Issuance of treasury stock for ESPP	(271)
Common stock issuance costs		(121)
Net cash provided by (used in) financing activities	(399,516)	391,230
Net increase (decrease) in cash and cash equivalents	(605,243)	232,273
Cash and cash equivalents, beginning of period	836,095	688,537
Cash and cash equivalents, ending of period	230,852	920,810
Cash payments for:
Interest	13,452	11,571
Income taxes	20,366	19,156
Non-cash investing and financing activities:
OREO acquired in settlement of loans	132	$ 137
Transfer of debt securities available for sale to held to maturity	$ 985,199