Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 2,267,224	$ 1,952,504
Federal funds sold and securities purchased under reverse repurchase agreements		50
Securities available for sale, at fair value (amortized cost: $2,531,885 - 2021 $1,959,773 - 2020; allowance for credit losses: $0)	2,548,739	1,991,815
Securities held to maturity, net of allowance for credit losses of $0 (fair value: $452,288 - 2021; $563,115 - 2020)	433,012	538,072
Paycheck Protection Program (PPP) loans	166,119	610,134
Loans held for sale (LHFS)	332,132	446,951
Loans held for investment (LHFI)	10,152,869	9,824,524
Less allowance for credit losses (ACL), LHFI	104,032	117,306
Net LHFI	10,048,837	9,707,218
Premises and equipment, net	200,970	194,278
Mortgage servicing rights	80,764	66,464
Goodwill	384,237	385,270
Identifiable intangible assets, net	6,170	7,390
Other real estate, net	9,439	11,651
Operating lease right-of-use assets	33,201	30,901
Other assets	587,288	609,142
Total Assets	17,098,132	16,551,840
Deposits:
Noninterest-bearing	4,446,991	4,349,010
Interest-bearing	10,185,093	9,699,754
Total deposits	14,632,084	14,048,764
Federal funds purchased and securities sold under repurchase agreements	157,176	164,519
Other borrowings	117,223	168,252
Subordinated notes	122,932	122,921
Junior subordinated debt securities	61,856	61,856
ACL on off-balance sheet credit exposures	33,733	38,572
Operating lease liabilities	34,959	32,290
Other liabilities	158,860	173,549
Total Liabilities	15,318,823	14,810,723
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 62,773,226 shares - 2021; 63,424,526 shares - 2020	13,079	13,215
Capital surplus	210,420	233,120
Retained earnings	1,566,451	1,495,833
Accumulated other comprehensive income (loss), net of tax	(10,641)	(1,051)
Total Shareholders' Equity	1,779,309	1,741,117
Total Liabilities and Shareholders' Equity	$ 17,098,132	$ 16,551,840