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Loans and Allowance for Loan Losses - Schedule of Loans Classified by Aging Analysis (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Commercial construction |  |
Financing Receivables, By Class | $ 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Commercial Real Estate |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Industrial revenue bonds |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Consumer auto |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Home Equity Line of Credit |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Land development |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | One- to four-family residential construction |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Subdivision construction |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Other residential |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Commercial business |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Consumer other |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 0 |
Financing Receivables Greater Than 90 Days Past Due and Still Accruing | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 0 |
Loans Receivable, Gross |  |
Financing Receivables, By Class | 0 |
Loans Receivable |  |
Financing Receivables, By Class | 0 |
Financial Asset, 30 to 59 Days Past Due | Commercial construction |  |
Financing Receivables, By Class | 0 | $ 15,085
Financial Asset, 30 to 59 Days Past Due | Commercial Real Estate |  |
Financing Receivables, By Class | 0 | 549
Financial Asset, 30 to 59 Days Past Due | Industrial revenue bonds |  |
Financing Receivables, By Class | 0 |
Financial Asset, 30 to 59 Days Past Due | Consumer auto |  |
Financing Receivables, By Class | 364 | 1,101
Financial Asset, 30 to 59 Days Past Due | Home Equity Line of Credit |  |
Financing Receivables, By Class | 153 | 296
Financial Asset, 30 to 59 Days Past Due | Land development |  |
Financing Receivables, By Class | 20 |
Financial Asset, 30 to 59 Days Past Due | One- to four-family residential construction |  |
Financing Receivables, By Class | 1,365 |
Financial Asset, 30 to 59 Days Past Due | Subdivision construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, 30 to 59 Days Past Due | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 1,379 | 1,453
Financial Asset, 30 to 59 Days Past Due | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 0 | 152
Financial Asset, 30 to 59 Days Past Due | Other residential |  |
Financing Receivables, By Class | 0 | 376
Financial Asset, 30 to 59 Days Past Due | Commercial business |  |
Financing Receivables, By Class | 0 | 60
Financial Asset, 30 to 59 Days Past Due | Consumer other |  |
Financing Receivables, By Class | 443 | 278
Financial Asset, 30 to 59 Days Past Due | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 1,662 | 2,177
Financial Asset, 30 to 59 Days Past Due | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 1,662 | 2,177
Financial Asset, 30 to 59 Days Past Due | Loans Receivable, Gross |  |
Financing Receivables, By Class | 5,386 | 21,527
Financial Asset, 30 to 59 Days Past Due | Loans Receivable |  |
Financing Receivables, By Class | 3,724 | 19,350
Financial Asset, 60 to 89 Days Past Due | Commercial construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Commercial Real Estate |  |
Financing Receivables, By Class | 79 | 119
Financial Asset, 60 to 89 Days Past Due | Industrial revenue bonds |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Consumer auto |  |
Financing Receivables, By Class | 119 | 259
Financial Asset, 60 to 89 Days Past Due | Home Equity Line of Credit |  |
Financing Receivables, By Class | 111 |
Financial Asset, 60 to 89 Days Past Due | Land development |  |
Financing Receivables, By Class | 0 | 27
Financial Asset, 60 to 89 Days Past Due | One- to four-family residential construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Subdivision construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 113 | 1,631
Financial Asset, 60 to 89 Days Past Due | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Other residential |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Commercial business |  |
Financing Receivables, By Class | 0 |
Financial Asset, 60 to 89 Days Past Due | Consumer other |  |
Financing Receivables, By Class | 7 | 233
Financial Asset, 60 to 89 Days Past Due | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 641 | 709
Financial Asset, 60 to 89 Days Past Due | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 641 | 709
Financial Asset, 60 to 89 Days Past Due | Loans Receivable, Gross |  |
Financing Receivables, By Class | 1,070 | 2,978
Financial Asset, 60 to 89 Days Past Due | Loans Receivable |  |
Financing Receivables, By Class | 429 | 2,269
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Real Estate |  |
Financing Receivables, By Class | 587 | 632
Financial Asset, Equal to or Greater than 90 Days Past Due | Industrial revenue bonds |  |
Financing Receivables, By Class | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer auto |  |
Financing Receivables, By Class | 169 | 558
Financial Asset, Equal to or Greater than 90 Days Past Due | Home Equity Line of Credit |  |
Financing Receivables, By Class | 508 | 517
Financial Asset, Equal to or Greater than 90 Days Past Due | Land development |  |
Financing Receivables, By Class | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due | One- to four-family residential construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due | Subdivision construction |  |
Financing Receivables, By Class | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 1,502 | 1,198
Financial Asset, Equal to or Greater than 90 Days Past Due | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 69 | 181
Financial Asset, Equal to or Greater than 90 Days Past Due | Other residential |  |
Financing Receivables, By Class | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial business |  |
Financing Receivables, By Class | 114 | 1,235
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer other |  |
Financing Receivables, By Class | 94 | 198
Financial Asset, Equal to or Greater than 90 Days Past Due | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 3,843 | 6,191
Financial Asset, Equal to or Greater than 90 Days Past Due | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 3,843 | 6,191
Financial Asset, Equal to or Greater than 90 Days Past Due | Loans Receivable, Gross |  |
Financing Receivables, By Class | 6,886 | 10,710
Financial Asset, Equal to or Greater than 90 Days Past Due | Loans Receivable |  |
Financing Receivables, By Class | 3,043 | 4,519
Financing Receivables Past Due | Commercial construction |  |
Financing Receivables, By Class | 0 | 15,085
Financing Receivables Past Due | Commercial Real Estate |  |
Financing Receivables, By Class | 666 | 1,300
Financing Receivables Past Due | Industrial revenue bonds |  |
Financing Receivables, By Class | 0 |
Financing Receivables Past Due | Consumer auto |  |
Financing Receivables, By Class | 652 | 1,918
Financing Receivables Past Due | Home Equity Line of Credit |  |
Financing Receivables, By Class | 772 | 813
Financing Receivables Past Due | Land development |  |
Financing Receivables, By Class | 20 | 27
Financing Receivables Past Due | One- to four-family residential construction |  |
Financing Receivables, By Class | 1,365 |
Financing Receivables Past Due | Subdivision construction |  |
Financing Receivables, By Class | 0 |
Financing Receivables Past Due | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 2,994 | 4,282
Financing Receivables Past Due | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 69 | 333
Financing Receivables Past Due | Other residential |  |
Financing Receivables, By Class | 0 | 376
Financing Receivables Past Due | Commercial business |  |
Financing Receivables, By Class | 114 | 1,295
Financing Receivables Past Due | Consumer other |  |
Financing Receivables, By Class | 544 | 709
Financing Receivables Past Due | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 6,146 | 9,077
Financing Receivables Past Due | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 6,146 | 9,077
Financing Receivables Past Due | Loans Receivable, Gross |  |
Financing Receivables, By Class | 13,342 | 35,215
Financing Receivables Past Due | Loans Receivable |  |
Financing Receivables, By Class | 7,196 | 26,138
Financing Receivables Current | Commercial construction |  |
Financing Receivables, By Class | 1,212,837 | 1,307,776
Financing Receivables Current | Commercial Real Estate |  |
Financing Receivables, By Class | 1,553,011 | 1,492,872
Financing Receivables Current | Industrial revenue bonds |  |
Financing Receivables, By Class | 14,003 | 13,189
Financing Receivables Current | Consumer auto |  |
Financing Receivables, By Class | 85,521 | 149,936
Financing Receivables Current | Home Equity Line of Credit |  |
Financing Receivables, By Class | 113,917 | 118,175
Financing Receivables Current | Land development |  |
Financing Receivables, By Class | 53,990 | 40,404
Financing Receivables Current | One- to four-family residential construction |  |
Financing Receivables, By Class | 41,428 | 33,963
Financing Receivables Current | Subdivision construction |  |
Financing Receivables, By Class | 30,894 | 16,088
Financing Receivables Current | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 467,442 | 382,734
Financing Receivables Current | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 114,500 | 120,010
Financing Receivables Current | Other residential |  |
Financing Receivables, By Class | 1,021,145 | 865,630
Financing Receivables Current | Commercial business |  |
Financing Receivables, By Class | 370,784 | 311,914
Financing Receivables Current | Consumer other |  |
Financing Receivables, By Class | 40,218 | 46,011
Financing Receivables Current | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 92,497 | 118,129
Financing Receivables Current | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 92,497 | 118,129
Financing Receivables Current | Loans Receivable, Gross |  |
Financing Receivables, By Class | 5,212,187 | 5,016,831
Financing Receivables Current | Loans Receivable |  |
Financing Receivables, By Class | 5,119,690 | 4,898,702
Financing Receivables Total | Commercial construction |  |
Financing Receivables, By Class | 1,212,837 | 1,322,861
Financing Receivables Total | Commercial Real Estate |  |
Financing Receivables, By Class | 1,553,677 | 1,494,172
Financing Receivables Total | Industrial revenue bonds |  |
Financing Receivables, By Class | 14,003 | 13,189
Financing Receivables Total | Consumer auto |  |
Financing Receivables, By Class | 86,173 | 151,854
Financing Receivables Total | Home Equity Line of Credit |  |
Financing Receivables, By Class | 114,689 | 118,988
Financing Receivables Total | Land development |  |
Financing Receivables, By Class | 54,010 | 40,431
Financing Receivables Total | One- to four-family residential construction |  |
Financing Receivables, By Class | 42,793 | 33,963
Financing Receivables Total | Subdivision construction |  |
Financing Receivables, By Class | 30,894 | 16,088
Financing Receivables Total | Owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 470,436 | 387,016
Financing Receivables Total | Non-owner occupied one- to four-family residential |  |
Financing Receivables, By Class | 114,569 | 120,343
Financing Receivables Total | Other residential |  |
Financing Receivables, By Class | 1,021,145 | 866,006
Financing Receivables Total | Commercial business |  |
Financing Receivables, By Class | 370,898 | 313,209
Financing Receivables Total | Consumer other |  |
Financing Receivables, By Class | 40,762 | 46,720
Financing Receivables Total | Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 98,643 | 127,206
Financing Receivables Total | Less Acquired Loans Net of Discount |  |
Financing Receivables, By Class | 98,643 | 127,206
Financing Receivables Total | Loans Receivable, Gross |  |
Financing Receivables, By Class | 5,225,529 | 5,052,046
Financing Receivables Total | Loans Receivable |  |
Financing Receivables, By Class | $ 5,126,886 | $ 4,924,840

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