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Allowance for Credit Losses and Credit Quality of Loans, Credit Quality Indicators (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 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 | $ 1,200,105 | $ 1,927,429
2020/2019 | 1,402,169 | 1,312,819
2019/2018 | 1,154,959 | 949,810
2018/2017 | 801,247 | 750,728
2017/2016 | 628,704 | 515,688
Prior | 1,531,338 | 1,262,066
Revolving Loans Amortized Cost Basis | 715,228 | 749,657
Revolving Loans Converted to Term | 83,877 | 30,688
Total | 7,517,627 | 7,498,885
C&I [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 180,491 | 352,323
2020/2019 | 283,865 | 195,227
2019/2018 | 157,352 | 106,502
2018/2017 | 86,756 | 50,153
2017/2016 | 34,735 | 35,040
Prior | 56,106 | 39,712
Revolving Loans Amortized Cost Basis | 334,434 | 346,233
Revolving Loans Converted to Term | 11,191 | 426
Total | 1,144,930 | 1,125,616
C&I [Member] | Pass [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 180,367 | 331,921
2020/2019 | 267,935 | 182,329
2019/2018 | 143,922 | 91,230
2018/2017 | 77,622 | 41,856
2017/2016 | 28,251 | 32,625
Prior | 48,225 | 32,609
Revolving Loans Amortized Cost Basis | 306,465 | 322,674
Revolving Loans Converted to Term | 10,934 | 412
Total | 1,063,721 | 1,035,656
C&I [Member] | Special Mention [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 98 | 20,064
2020/2019 | 15,548 | 6,534
2019/2018 | 5,926 | 5,053
2018/2017 | 3,619 | 4,702
2017/2016 | 3,547 | 1,624
Prior | 4,057 | 2,830
Revolving Loans Amortized Cost Basis | 20,651 | 13,614
Revolving Loans Converted to Term | 0 | 0
Total | 53,446 | 54,421
C&I [Member] | Substandard [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 26 | 338
2020/2019 | 382 | 6,364
2019/2018 | 7,504 | 10,219
2018/2017 | 5,514 | 3,388
2017/2016 | 2,741 | 791
Prior | 3,823 | 4,272
Revolving Loans Amortized Cost Basis | 7,318 | 9,945
Revolving Loans Converted to Term | 257 | 14
Total | 27,565 | 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 | 1 | 207
2017/2016 | 196 | 0
Prior | 1 | 1
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 198 | 208
CRE [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 224,520 | 472,506
2020/2019 | 446,842 | 412,425
2019/2018 | 409,666 | 296,712
2018/2017 | 276,098 | 342,604
2017/2016 | 311,007 | 255,045
Prior | 651,965 | 496,867
Revolving Loans Amortized Cost Basis | 118,601 | 115,926
Revolving Loans Converted to Term | 60,252 | 20,200
Total | 2,498,951 | 2,412,285
CRE [Member] | Pass [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 224,088 | 469,919
2020/2019 | 445,353 | 361,187
2019/2018 | 351,481 | 256,154
2018/2017 | 252,634 | 271,874
2017/2016 | 275,791 | 212,197
Prior | 516,252 | 383,690
Revolving Loans Amortized Cost Basis | 116,287 | 113,128
Revolving Loans Converted to Term | 60,252 | 4,034
Total | 2,242,138 | 2,072,183
CRE [Member] | Special Mention [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 432 | 2,051
2020/2019 | 1,408 | 44,034
2019/2018 | 40,057 | 22,260
2018/2017 | 8,046 | 55,039
2017/2016 | 22,483 | 36,830
Prior | 67,304 | 43,537
Revolving Loans Amortized Cost Basis | 1,068 | 1,297
Revolving Loans Converted to Term | 0 | 11,524
Total | 140,798 | 216,572
CRE [Member] | Substandard [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 536
2020/2019 | 81 | 5,307
2019/2018 | 16,231 | 18,298
2018/2017 | 15,418 | 15,691
2017/2016 | 12,733 | 6,018
Prior | 61,573 | 62,168
Revolving Loans Amortized Cost Basis | 1,246 | 1,501
Revolving Loans Converted to Term | 0 | 4,642
Total | 107,282 | 114,161
CRE [Member] | Doubtful [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 0
2020/2019 | 0 | 1,897
2019/2018 | 1,897 | 0
2018/2017 | 0 | 0
2017/2016 | 0 | 0
Prior | 6,836 | 7,472
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 8,733 | 9,369
PPP [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 270,953 | 430,810
2020/2019 | 88,785 | 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 | 359,738 | 430,810
PPP [Member] | Pass [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 270,953 | 430,810
2020/2019 | 88,785 | 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 | 359,738 | 430,810
Auto [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 205,017 | 198,240
2020/2019 | 165,014 | 315,174
2019/2018 | 244,408 | 202,985
2018/2017 | 145,033 | 116,502
2017/2016 | 75,425 | 45,932
Prior | 28,190 | 13,250
Revolving Loans Amortized Cost Basis | 20 | 22
Revolving Loans Converted to Term | 0 | 0
Total | 863,107 | 892,105
Auto [Member] | Performing [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 204,980 | 197,881
2020/2019 | 164,749 | 314,034
2019/2018 | 243,935 | 201,850
2018/2017 | 144,665 | 115,977
2017/2016 | 75,078 | 45,495
Prior | 28,190 | 13,250
Revolving Loans Amortized Cost Basis | 20 | 22
Revolving Loans Converted to Term | 0 | 0
Total | 861,617 | 888,509
Auto [Member] | Nonperforming [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 37 | 359
2020/2019 | 265 | 1,140
2019/2018 | 473 | 1,135
2018/2017 | 368 | 525
2017/2016 | 347 | 437
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 1,490 | 3,596
Other Consumer [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 157,725 | 234,967
2020/2019 | 183,650 | 178,829
2019/2018 | 143,414 | 127,856
2018/2017 | 99,516 | 55,941
2017/2016 | 40,695 | 14,345
Prior | 22,040 | 17,547
Revolving Loans Amortized Cost Basis | 15,623 | 18,598
Revolving Loans Converted to Term | 37 | 71
Total | 662,700 | 648,154
Other Consumer [Member] | Performing [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 157,719 | 234,628
2020/2019 | 183,271 | 178,411
2019/2018 | 143,208 | 127,549
2018/2017 | 99,444 | 55,676
2017/2016 | 40,466 | 14,255
Prior | 22,031 | 17,414
Revolving Loans Amortized Cost Basis | 15,621 | 18,588
Revolving Loans Converted to Term | 17 | 71
Total | 661,777 | 646,592
Other Consumer [Member] | Nonperforming [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 6 | 339
2020/2019 | 379 | 418
2019/2018 | 206 | 307
2018/2017 | 72 | 265
2017/2016 | 229 | 90
Prior | 9 | 133
Revolving Loans Amortized Cost Basis | 2 | 10
Revolving Loans Converted to Term | 20 | 0
Total | 923 | 1,562
Residential [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 161,399 | 238,583
2020/2019 | 234,013 | 211,164
2019/2018 | 200,119 | 215,755
2018/2017 | 193,844 | 185,528
2017/2016 | 166,842 | 165,326
Prior | 773,037 | 694,690
Revolving Loans Amortized Cost Basis | 246,550 | 268,878
Revolving Loans Converted to Term | 12,397 | 9,991
Total | 1,988,201 | 1,989,915
Residential [Member] | Performing [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 161,399 | 237,338
2020/2019 | 232,662 | 210,505
2019/2018 | 199,467 | 213,437
2018/2017 | 191,931 | 182,993
2017/2016 | 164,674 | 164,424
Prior | 763,772 | 684,495
Revolving Loans Amortized Cost Basis | 246,550 | 268,878
Revolving Loans Converted to Term | 12,397 | 9,991
Total | 1,972,852 | 1,972,061
Residential [Member] | Nonperforming [Member] |  |
Credit Quality by Loan Class [Abstract] |  |
2021/2020 | 0 | 1,245
2020/2019 | 1,351 | 659
2019/2018 | 652 | 2,318
2018/2017 | 1,913 | 2,535
2017/2016 | 2,168 | 902
Prior | 9,265 | 10,195
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | $ 15,349 | $ 17,854

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