Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 2,175,058	$ 1,952,504
Federal funds sold and securities purchased under reverse repurchase agreements		50
Securities available for sale, at fair value (amortized cost: $3,053,294 - 2021 $1,959,773 - 2020; allowance for credit losses: $0)	3,057,605	1,991,815
Securities held to maturity, net of allowance for credit losses of $0 (fair value: $411,132 - 2021; $563,115 - 2020)	394,905	538,072
Paycheck Protection Program (PPP) loans	46,486	610,134
Loans held for sale (LHFS)	335,339	446,951
Loans held for investment (LHFI)	10,174,899	9,824,524
Less allowance for credit losses (ACL), LHFI	104,073	117,306
Net LHFI	10,070,826	9,707,218
Premises and equipment, net	201,937	194,278
Mortgage servicing rights	84,101	66,464
Goodwill	384,237	385,270
Identifiable intangible assets, net	5,621	7,390
Other real estate, net	6,213	11,651
Operating lease right-of-use assets	34,689	30,901
Other assets	567,627	609,142
Total Assets	17,364,644	16,551,840
Deposits:
Noninterest-bearing	4,987,885	4,349,010
Interest-bearing	9,934,954	9,699,754
Total deposits	14,922,839	14,048,764
Federal funds purchased and securities sold under repurchase agreements	146,417	164,519
Other borrowings	94,889	168,252
Subordinated notes	122,987	122,921
Junior subordinated debt securities	61,856	61,856
ACL on off-balance sheet credit exposures	32,684	38,572
Operating lease liabilities	36,531	32,290
Other liabilities	177,494	173,549
Total Liabilities	15,595,697	14,810,723
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 62,461,832 shares - 2021; 63,424,526 shares - 2020	13,014	13,215
Capital surplus	201,837	233,120
Retained earnings	1,573,176	1,495,833
Accumulated other comprehensive income (loss), net of tax	(19,080)	(1,051)
Total Shareholders' Equity	1,768,947	1,741,117
Total Liabilities and Shareholders' Equity	$ 17,364,644	$ 16,551,840