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Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | $ 10,641,937 | $ 9,427,660 |  |
Allowance for Credit Loss | (155,578) | (149,140) | $ (83,968) | $ (83,369)
Total loans, net | 10,486,359 | 9,278,520 |  |
Commercial Real Estate |  |  |  |
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | 4,981,263 | 4,062,313 |  |
Allowance for Credit Loss | (61,254) | (68,934) | (20,340) | (14,864)
Commercial Business |  |  |  |
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | 3,423,268 | 3,597,968 |  |
Allowance for Credit Loss | (54,712) | (45,250) | (30,292) | (34,658)
Agriculture |  |  |  |
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | 795,715 | 779,627 |  |
Allowance for Credit Loss | (8,148) | (9,052) | (15,835) | (9,589)
Construction |  |  |  |
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | 384,755 | 268,663 |  |
Allowance for Credit Loss | (5,397) | (7,636) | (8,571) | (14,395)
Real estate: One-to-four family residential |  |  |  |
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | 1,013,908 | 683,570 |  |
Allowance for Credit Loss | (24,123) | (16,875) | (7,435) | (8,024)
Consumer Loan |  |  |  |
Financing Receivable, Credit Quality Indicator - narrative [Line Items] |  |  |  |
Total loans, net of unearned income | 43,028 | 35,519 |  |
Allowance for Credit Loss | $ (1,944) | $ (1,393) | $ (883) | $ (786)

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