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Allowance for Credit Losses and Credit Quality of Loans, Credit Quality Indicators (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Minimum number of days past due for loans to be considered nonperforming | 90 days |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | $ 1,683,857 | $ 1,927,429
2020/2019 | 1,278,131 | 1,312,819
2019/2018 | 1,098,762 | 949,810
2018/2017 | 743,460 | 750,728
2017/2016 | 578,691 | 515,688
Prior | 1,427,696 | 1,262,066
Revolving Loans Amortized Cost Basis | 716,030 | 749,657
Revolving Loans Converted to Term | 39,815 | 30,688
Total | 7,566,442 | 7,498,885
C&I [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 258,221 | 352,323
2020/2019 | 260,929 | 195,227
2019/2018 | 140,438 | 106,502
2018/2017 | 76,173 | 50,153
2017/2016 | 29,464 | 35,040
Prior | 47,283 | 39,712
Revolving Loans Amortized Cost Basis | 293,744 | 346,233
Revolving Loans Converted to Term | 11,553 | 426
Total | 1,117,805 | 1,125,616
C&I [Member] | Pass [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 258,044 | 331,921
2020/2019 | 256,285 | 182,329
2019/2018 | 127,995 | 91,230
2018/2017 | 71,024 | 41,856
2017/2016 | 23,541 | 32,625
Prior | 40,962 | 32,609
Revolving Loans Amortized Cost Basis | 282,471 | 322,674
Revolving Loans Converted to Term | 6,724 | 412
Total | 1,067,046 | 1,035,656
C&I [Member] | Special Mention [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 163 | 20,064
2020/2019 | 4,277 | 6,534
2019/2018 | 5,157 | 5,053
2018/2017 | 3,339 | 4,702
2017/2016 | 3,063 | 1,624
Prior | 3,381 | 2,830
Revolving Loans Amortized Cost Basis | 8,477 | 13,614
Revolving Loans Converted to Term | 0 | 0
Total | 27,857 | 54,421
C&I [Member] | Substandard [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 14 | 338
2020/2019 | 367 | 6,364
2019/2018 | 7,286 | 10,219
2018/2017 | 1,684 | 3,388
2017/2016 | 2,675 | 791
Prior | 2,939 | 4,272
Revolving Loans Amortized Cost Basis | 2,796 | 9,945
Revolving Loans Converted to Term | 4,829 | 14
Total | 22,590 | 35,331
C&I [Member] | Doubtful [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 0
2020/2019 | 0 | 0
2019/2018 | 0 | 0
2018/2017 | 126 | 207
2017/2016 | 185 | 0
Prior | 1 | 1
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 312 | 208
CRE [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 325,888 | 472,506
2020/2019 | 454,150 | 412,425
2019/2018 | 427,993 | 296,712
2018/2017 | 269,664 | 342,604
2017/2016 | 297,505 | 255,045
Prior | 611,369 | 496,867
Revolving Loans Amortized Cost Basis | 155,001 | 115,926
Revolving Loans Converted to Term | 16,661 | 20,200
Total | 2,558,231 | 2,412,285
CRE [Member] | Pass [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 325,092 | 469,919
2020/2019 | 453,138 | 361,187
2019/2018 | 390,834 | 256,154
2018/2017 | 249,362 | 271,874
2017/2016 | 264,620 | 212,197
Prior | 486,685 | 383,690
Revolving Loans Amortized Cost Basis | 152,622 | 113,128
Revolving Loans Converted to Term | 16,661 | 4,034
Total | 2,339,014 | 2,072,183
CRE [Member] | Special Mention [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 796 | 2,051
2020/2019 | 933 | 44,034
2019/2018 | 21,467 | 22,260
2018/2017 | 4,747 | 55,039
2017/2016 | 20,344 | 36,830
Prior | 67,530 | 43,537
Revolving Loans Amortized Cost Basis | 1,140 | 1,297
Revolving Loans Converted to Term | 0 | 11,524
Total | 116,957 | 216,572
CRE [Member] | Substandard [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 536
2020/2019 | 79 | 5,307
2019/2018 | 15,692 | 18,298
2018/2017 | 15,555 | 15,691
2017/2016 | 12,541 | 6,018
Prior | 50,428 | 62,168
Revolving Loans Amortized Cost Basis | 1,239 | 1,501
Revolving Loans Converted to Term | 0 | 4,642
Total | 95,534 | 114,161
CRE [Member] | Doubtful [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 0
2020/2019 | 0 | 1,897
2019/2018 | 0 | 0
2018/2017 | 0 | 0
2017/2016 | 0 | 0
Prior | 6,726 | 7,472
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 6,726 | 9,369
PPP [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 256,940 | 430,810
2020/2019 | 19,255 | 0
2019/2018 | 0 | 0
2018/2017 | 0 | 0
2017/2016 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 276,195 | 430,810
PPP [Member] | Pass [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 256,940 | 430,810
2020/2019 | 19,255 | 0
2019/2018 | 0 | 0
2018/2017 | 0 | 0
2017/2016 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 276,195 | 430,810
Auto [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 280,953 | 198,240
2020/2019 | 145,905 | 315,174
2019/2018 | 212,633 | 202,985
2018/2017 | 121,646 | 116,502
2017/2016 | 59,316 | 45,932
Prior | 18,684 | 13,250
Revolving Loans Amortized Cost Basis | 0 | 22
Revolving Loans Converted to Term | 0 | 0
Total | 839,137 | 892,105
Auto [Member] | Performing [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 280,805 | 197,881
2020/2019 | 145,585 | 314,034
2019/2018 | 211,921 | 201,850
2018/2017 | 121,108 | 115,977
2017/2016 | 59,047 | 45,495
Prior | 18,684 | 13,250
Revolving Loans Amortized Cost Basis | 0 | 22
Revolving Loans Converted to Term | 0 | 0
Total | 837,150 | 888,509
Auto [Member] | Nonperforming [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 148 | 359
2020/2019 | 320 | 1,140
2019/2018 | 712 | 1,135
2018/2017 | 538 | 525
2017/2016 | 269 | 437
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 1,987 | 3,596
Other Consumer [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 298,601 | 234,967
2020/2019 | 166,401 | 178,829
2019/2018 | 129,189 | 127,856
2018/2017 | 88,407 | 55,941
2017/2016 | 35,049 | 14,345
Prior | 18,556 | 17,547
Revolving Loans Amortized Cost Basis | 18,519 | 18,598
Revolving Loans Converted to Term | 15 | 71
Total | 754,737 | 648,154
Other Consumer [Member] | Performing [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 298,505 | 234,628
2020/2019 | 166,111 | 178,411
2019/2018 | 128,954 | 127,549
2018/2017 | 88,311 | 55,676
2017/2016 | 34,858 | 14,255
Prior | 18,447 | 17,414
Revolving Loans Amortized Cost Basis | 18,516 | 18,588
Revolving Loans Converted to Term | 15 | 71
Total | 753,717 | 646,592
Other Consumer [Member] | Nonperforming [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 96 | 339
2020/2019 | 290 | 418
2019/2018 | 235 | 307
2018/2017 | 96 | 265
2017/2016 | 191 | 90
Prior | 109 | 133
Revolving Loans Amortized Cost Basis | 3 | 10
Revolving Loans Converted to Term | 0 | 0
Total | 1,020 | 1,562
Residential [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 263,254 | 238,583
2020/2019 | 231,491 | 211,164
2019/2018 | 188,509 | 215,755
2018/2017 | 187,570 | 185,528
2017/2016 | 157,357 | 165,326
Prior | 731,804 | 694,690
Revolving Loans Amortized Cost Basis | 248,766 | 268,878
Revolving Loans Converted to Term | 11,586 | 9,991
Total | 2,020,337 | 1,989,915
Residential [Member] | Performing [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 263,254 | 237,338
2020/2019 | 229,961 | 210,505
2019/2018 | 187,776 | 213,437
2018/2017 | 185,798 | 182,993
2017/2016 | 155,725 | 164,424
Prior | 722,718 | 684,495
Revolving Loans Amortized Cost Basis | 248,727 | 268,878
Revolving Loans Converted to Term | 11,494 | 9,991
Total | 2,005,453 | 1,972,061
Residential [Member] | Nonperforming [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 1,245
2020/2019 | 1,530 | 659
2019/2018 | 733 | 2,318
2018/2017 | 1,772 | 2,535
2017/2016 | 1,632 | 902
Prior | 9,086 | 10,195
Revolving Loans Amortized Cost Basis | 39 | 0
Revolving Loans Converted to Term | 92 | 0
Total | $ 14,884 | $ 17,854

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