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Loans and Allowance - Credit Quality of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | $ 2,334,716 |
2020 | 2,732,120 |
2019 | 898,386 |
2018 | 437,873 |
2017 | 396,281 |
Prior | 691,683 |
Revolving loans amortized cost basis | 1,550,278 |
Revolving loans converted to term | 239 |
Loans | 9,041,576 | $ 9,243,174
Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 7,000,298
Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 334,989
Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 234,712
Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 1,666,062
Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 7,113
PPP loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 182,200 |
2020 | 15,900 |
Loans | 198,100 | 667,100
Commercial and industrial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 811,829 |
2020 | 487,811 |
2019 | 194,424 |
2018 | 78,731 |
2017 | 27,279 |
Prior | 44,221 |
Revolving loans amortized cost basis | 929,320 |
Revolving loans converted to term | 0 |
Loans | 2,573,615 | 2,776,699
Commercial and industrial loans | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 795,366 |
2020 | 458,425 |
2019 | 188,155 |
2018 | 74,791 |
2017 | 24,767 |
Prior | 41,419 |
Revolving loans amortized cost basis | 884,233 |
Revolving loans converted to term | 0 |
Loans | 2,467,156 |
Commercial and industrial loans | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 10,551 |
2020 | 27,059 |
2019 | 211 |
2018 | 992 |
2017 | 2,032 |
Prior | 2,026 |
Revolving loans amortized cost basis | 17,466 |
Revolving loans converted to term | 0 |
Loans | 60,337 |
Commercial and industrial loans | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 5,912 |
2020 | 2,327 |
2019 | 6,058 |
2018 | 2,948 |
2017 | 480 |
Prior | 776 |
Revolving loans amortized cost basis | 27,621 |
Revolving loans converted to term | 0 |
Loans | 46,122 |
Commercial and industrial loans | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 2,562,077
Commercial and industrial loans | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 117,503
Commercial and industrial loans | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 97,119
Commercial and industrial loans | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial and industrial loans | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial and industrial loans | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial and industrial loans | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Agricultural land, production and other loans to farmers |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 37,803 |
2020 | 50,839 |
2019 | 23,584 |
2018 | 10,950 |
2017 | 7,451 |
Prior | 43,191 |
Revolving loans amortized cost basis | 66,868 |
Revolving loans converted to term | 0 |
Loans | 240,686 | 281,884
Agricultural land, production and other loans to farmers | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 37,000 |
2020 | 48,740 |
2019 | 23,447 |
2018 | 9,152 |
2017 | 7,451 |
Prior | 39,875 |
Revolving loans amortized cost basis | 63,254 |
Revolving loans converted to term | 0 |
Loans | 228,919 |
Agricultural land, production and other loans to farmers | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 84 |
2020 | 1,561 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
Prior | 391 |
Revolving loans amortized cost basis | 274 |
Revolving loans converted to term | 0 |
Loans | 2,310 |
Agricultural land, production and other loans to farmers | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 719 |
2020 | 538 |
2019 | 137 |
2018 | 1,798 |
2017 | 0 |
Prior | 2,925 |
Revolving loans amortized cost basis | 3,340 |
Revolving loans converted to term | 0 |
Loans | 9,457 |
Agricultural land, production and other loans to farmers | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 243,991
Agricultural land, production and other loans to farmers | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 26,835
Agricultural land, production and other loans to farmers | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 9,885
Agricultural land, production and other loans to farmers | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Agricultural land, production and other loans to farmers | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Agricultural land, production and other loans to farmers | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 1,173
Agricultural land, production and other loans to farmers | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 153,492 |
2020 | 202,755 |
2019 | 114,065 |
2018 | 31,118 |
2017 | 2,229 |
Prior | 2,559 |
Revolving loans amortized cost basis | 15,671 |
Revolving loans converted to term | 0 |
Loans | 521,889 | 484,723
Construction | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 132,653 |
2020 | 202,455 |
2019 | 114,065 |
2018 | 31,056 |
2017 | 2,229 |
Prior | 2,559 |
Revolving loans amortized cost basis | 15,671 |
Revolving loans converted to term |  |
Loans | 500,688 |
Construction | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 20,839 |
2020 | 275 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 21,114 |
Construction | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 0 |
2020 | 25 |
2019 | 0 |
2018 | 62 |
2017 | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 87 |
Construction | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 446,846
Construction | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 10,445
Construction | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 5,549
Construction | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Construction | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Construction | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 21,763
Construction | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 120
Commercial real estate, non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 527,316 |
2020 | 939,069 |
2019 | 229,044 |
2018 | 133,851 |
2017 | 134,522 |
Prior | 159,889 |
Revolving loans amortized cost basis | 26,696 |
Revolving loans converted to term | 0 |
Loans | 2,150,387 | 2,220,949
Commercial real estate, non-owner occupied | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 455,140 |
2020 | 740,465 |
2019 | 228,864 |
2018 | 132,584 |
2017 | 127,045 |
Prior | 156,901 |
Revolving loans amortized cost basis | 26,696 |
Revolving loans converted to term | 0 |
Loans | 1,867,695 |
Commercial real estate, non-owner occupied | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 52,739 |
2020 | 172,621 |
2019 | 0 |
2018 | 98 |
2017 | 0 |
Prior | 2,698 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 228,156 |
Commercial real estate, non-owner occupied | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 19,437 |
2020 | 25,983 |
2019 | 180 |
2018 | 1,169 |
2017 | 7,477 |
Prior | 290 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 54,536 |
Commercial real estate, non-owner occupied | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 1,979,827
Commercial real estate, non-owner occupied | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 160,304
Commercial real estate, non-owner occupied | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 80,818
Commercial real estate, non-owner occupied | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial real estate, non-owner occupied | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial real estate, non-owner occupied | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial real estate, non-owner occupied | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial real estate, owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 224,644 |
2020 | 434,040 |
2019 | 100,126 |
2018 | 47,124 |
2017 | 52,213 |
Prior | 61,677 |
Revolving loans amortized cost basis | 32,617 |
Revolving loans converted to term | 0 |
Loans | 952,441 | 958,501
Commercial real estate, owner occupied | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 221,409 |
2020 | 423,411 |
2019 | 99,381 |
2018 | 45,467 |
2017 | 49,800 |
Prior | 58,497 |
Revolving loans amortized cost basis | 32,468 |
Revolving loans converted to term | 0 |
Loans | 930,433 |
Commercial real estate, owner occupied | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 1,548 |
2020 | 6,064 |
2019 | 745 |
2018 | 1,604 |
2017 | 0 |
Prior | 1,326 |
Revolving loans amortized cost basis | 149 |
Revolving loans converted to term | 0 |
Loans | 11,436 |
Commercial real estate, owner occupied | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 1,687 |
2020 | 4,565 |
2019 | 0 |
2018 | 53 |
2017 | 2,413 |
Prior | 1,854 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 10,572 |
Commercial real estate, owner occupied | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 907,566
Commercial real estate, owner occupied | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 17,641
Commercial real estate, owner occupied | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 33,294
Commercial real estate, owner occupied | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  |
Commercial real estate, owner occupied | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  |
Commercial real estate, owner occupied | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Commercial real estate, owner occupied | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 265,635 |
2020 | 385,523 |
2019 | 116,074 |
2018 | 81,303 |
2017 | 60,736 |
Prior | 240,747 |
Revolving loans amortized cost basis | 4,311 |
Revolving loans converted to term | 44 |
Loans | 1,154,373 | 1,234,741
Residential | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 263,658 |
2020 | 381,258 |
2019 | 115,505 |
2018 | 80,009 |
2017 | 60,398 |
Prior | 235,365 |
Revolving loans amortized cost basis | 4,306 |
Revolving loans converted to term | 44 |
Loans | 1,140,543 |
Residential | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 874 |
2020 | 1,131 |
2019 | 464 |
2018 | 27 |
2017 | 229 |
Prior | 2,200 |
Revolving loans amortized cost basis | 5 |
Revolving loans converted to term | 0 |
Loans | 4,930 |
Residential | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 1,103 |
2020 | 3,134 |
2019 | 105 |
2018 | 1,267 |
2017 | 109 |
Prior | 3,182 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 8,900 |
Residential | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 199,338
Residential | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 2,261
Residential | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 7,058
Residential | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Residential | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Residential | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 1,020,687
Residential | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 5,397
Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 68,790 |
2020 | 21,560 |
2019 | 2,315 |
2018 | 2,383 |
2017 | 1,513 |
Prior | 4,199 |
Revolving loans amortized cost basis | 430,352 |
Revolving loans converted to term | 195 |
Loans | 531,307 | 508,259
Home equity | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 68,318 |
2020 | 21,473 |
2019 | 2,315 |
2018 | 2,374 |
2017 | 1,419 |
Prior | 3,982 |
Revolving loans amortized cost basis | 427,901 |
Revolving loans converted to term | 195 |
Loans | 527,977 |
Home equity | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 0 |
2020 | 87 |
2019 | 0 |
2018 | 9 |
2017 | 0 |
Prior | 17 |
Revolving loans amortized cost basis | 1,378 |
Revolving loans converted to term | 0 |
Loans | 1,491 |
Home equity | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 472 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
2017 | 94 |
Prior | 200 |
Revolving loans amortized cost basis | 1,073 |
Revolving loans converted to term | 0 |
Loans | 1,839 |
Home equity | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 12,714
Home equity | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Home equity | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 989
Home equity | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Home equity | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Home equity | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 492,999
Home equity | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 1,557
Individuals' loans for household and other personal expenditures |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 41,398 |
2020 | 30,610 |
2019 | 17,862 |
2018 | 13,177 |
2017 | 2,664 |
Prior | 5,712 |
Revolving loans amortized cost basis | 23,670 |
Revolving loans converted to term | 0 |
Loans | 135,093 | 129,479
Individuals' loans for household and other personal expenditures | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 41,367 |
2020 | 30,506 |
2019 | 17,797 |
2018 | 13,132 |
2017 | 2,657 |
Prior | 5,684 |
Revolving loans amortized cost basis | 23,659 |
Revolving loans converted to term | 0 |
Loans | 134,802 |
Individuals' loans for household and other personal expenditures | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 31 |
2020 | 101 |
2019 | 65 |
2018 | 45 |
2017 | 7 |
Prior | 15 |
Revolving loans amortized cost basis | 11 |
Revolving loans converted to term | 0 |
Loans | 275 |
Individuals' loans for household and other personal expenditures | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 0 |
2020 | 3 |
2019 | 0 |
2018 | 0 |
2017 | 0 |
Prior | 13 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Loans | 16 |
Individuals' loans for household and other personal expenditures | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Individuals' loans for household and other personal expenditures | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Individuals' loans for household and other personal expenditures | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Individuals' loans for household and other personal expenditures | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Individuals' loans for household and other personal expenditures | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Individuals' loans for household and other personal expenditures | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 129,440
Individuals' loans for household and other personal expenditures | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 39
Public finance and other commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 203,809 |
2020 | 179,913 |
2019 | 100,892 |
2018 | 39,236 |
2017 | 107,674 |
Prior | 129,488 |
Revolving loans amortized cost basis | 20,773 |
Revolving loans converted to term | 0 |
Loans | 781,785 | 647,939
Public finance and other commercial loans | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2021 | 203,809 |
2020 | 179,913 |
2019 | 100,892 |
2018 | 39,236 |
2017 | 107,674 |
Prior | 129,488 |
Revolving loans amortized cost basis | 20,773 |
Revolving loans converted to term | 0 |
Loans | $ 781,785 |
Public finance and other commercial loans | Commercial Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 647,939
Public finance and other commercial loans | Commercial Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Public finance and other commercial loans | Commercial Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Public finance and other commercial loans | Commercial Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Public finance and other commercial loans | Commercial Loss |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Public finance and other commercial loans | Consumer Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | 0
Public finance and other commercial loans | Consumer Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans |  | $ 0

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