Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 1,297,144	$ 734,787
Federal funds sold and securities purchased under reverse repurchase agreements	0	4,000
Securities available for sale, at fair value (amortized cost: $2,200,255 - 2023 $2,270,709 - 2022; allowance for credit losses (ACL): $0)	1,984,162	2,024,082
Securities held to maturity, net of ACL of $0 (fair value: $1,406,405 - 2023; $1,406,589 - 2022)	1,474,338	1,494,514
Loans held for sale (LHFS)	175,926	135,226
Loans held for investment (LHFI)	12,497,195	12,204,039
Less ACL, LHFI	122,239	120,214
Net LHFI	12,374,956	12,083,825
Premises and equipment, net	223,975	212,365
Mortgage servicing rights (MSR)	127,206	129,677
Goodwill	384,237	384,237
Identifiable intangible assets, net	3,352	3,640
Other real estate, net	1,684	1,986
Operating lease right-of-use assets	35,315	36,301
Other assets	794,883	770,838
Total Assets	18,877,178	18,015,478
Deposits:
Noninterest-bearing	3,797,055	4,093,771
Interest-bearing	10,986,606	10,343,877
Total deposits	14,783,661	14,437,648
Federal funds purchased and securities sold under repurchase agreements	477,980	449,331
Other borrowings	1,485,181	1,050,938
Subordinated notes	123,317	123,262
Junior subordinated debt securities	61,856	61,856
ACL on off-balance sheet credit exposures	34,596	36,838
Operating lease liabilities	37,988	38,932
Other liabilities	310,500	324,405
Total Liabilities	17,315,079	16,523,210
Shareholders' Equity
Authorized: 250,000,000 shares Issued and outstanding: 61,048,516 shares - 2023; 60,977,686 shares - 2022	12,720	12,705
Capital surplus	155,297	154,645
Retained earnings	1,636,463	1,600,321
Accumulated other comprehensive income (loss), net of tax	(242,381)	(275,403)
Total Shareholders' Equity	1,562,099	1,492,268
Total Liabilities and Shareholders' Equity	$ 18,877,178	$ 18,015,478