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Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | $ 16,998 | $ 23,041
Total Loans | 11,322,387 | 10,641,937
Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 2,675 | 1,872
Total Loans | 5,251,100 | 4,981,263
Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 9,947 | 13,321
Total Loans | 3,646,956 | 3,423,268
Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 3,216 | 5,396
Total Loans | 853,099 | 795,715
Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 0 | 0
Total Loans | 482,211 | 384,755
One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 1,140 | 2,433
Total Loans | 1,042,190 | 1,013,908
Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 20 | 19
Total Loans | 46,831 | 43,028
Financial Asset, Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 11,283,003 | 10,611,528
Financial Asset, Not Past Due | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,244,961 | 4,977,781
Financial Asset, Not Past Due | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,621,858 | 3,406,539
Financial Asset, Not Past Due | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 849,483 | 789,112
Financial Asset, Not Past Due | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 481,238 | 384,755
Financial Asset, Not Past Due | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,038,770 | 1,010,343
Financial Asset, Not Past Due | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 46,693 | 42,998
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 19,209 | 4,860
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,281 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 14,910 | 2,721
Financial Asset, 30 to 59 Days Past Due [Member] | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 400 | 1,207
Financial Asset, 30 to 59 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 973 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,537 | 921
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 108 | 11
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,177 | 2,508
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,183 | 1,610
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 241 | 687
Financial Asset, 60 to 89 Days Past Due [Member] | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 743 | 211
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 10 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 22,386 | 7,368
Financial Asset, Past Due | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,464 | 1,610
Financial Asset, Past Due | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 15,151 | 3,408
Financial Asset, Past Due | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 400 | 1,207
Financial Asset, Past Due | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 973 | 0
Financial Asset, Past Due | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,280 | 1,132
Financial Asset, Past Due | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 118 | $ 11

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