Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	$ 11,610,973	$ 10,641,937
Allowance for Credit Loss	(158,438)	(155,578)	$ (149,140)	$ (83,968)
Total loans, net	11,452,535	10,486,359
Commercial Real Estate
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	5,352,785	4,981,263
Allowance for Credit Loss	(54,856)	(61,254)	(68,934)	(20,340)
Commercial Business
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	3,750,564	3,423,268
Allowance for Credit Loss	(57,836)	(54,712)	(45,250)	(30,292)
Agriculture
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	848,903	795,715
Allowance for Credit Loss	(9,071)	(8,148)	(9,052)	(15,835)
Construction
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	540,861	384,755
Allowance for Credit Loss	(13,142)	(5,397)	(7,636)	(8,571)
Real estate: One-to-four family residential
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	1,077,494	1,013,908
Allowance for Credit Loss	(22,355)	(24,123)	(16,875)	(7,435)
Consumer Loan
Financing Receivable, Credit Quality Indicator - narrative [Line Items]
Total loans, net of unearned income	40,366	43,028
Allowance for Credit Loss	$ (1,178)	$ (1,944)	$ (1,393)	$ (883)