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Loans and Allowance for Credit Losses Credit Quality Indicators (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Total      
Current period gross charge-offs $ (8,047) $ (22,050)  
Current period recoveries 3,926 6,813  
Current period net charge-offs (4,121) (15,237)  
Gross loans 18,728,480 18,728,480 $ 16,864,336
Real-estate - home equity      
Total      
Gross loans 1,251,455 1,251,455 1,314,944
Real estate - residential mortgage      
Total      
Gross loans 2,862,226 2,862,226 2,641,465
Consumer      
Total      
Gross loans 465,610 465,610 463,164
Commercial and industrial      
Total      
Gross loans 5,971,201 5,971,201 4,446,701
Commercial and industrial | Pass      
Total      
Gross loans     4,065,834
Commercial and industrial | Special Mention      
Total      
Gross loans     181,107
Commercial and industrial | Substandard or Lower      
Total      
Gross loans     199,760
Real estate - commercial mortgage      
Total      
Gross loans 6,934,936 6,934,936 6,700,776
Real estate - commercial mortgage | Pass      
Total      
Gross loans     6,429,407
Real estate - commercial mortgage | Special Mention      
Total      
Gross loans     137,163
Real estate - commercial mortgage | Substandard or Lower      
Total      
Gross loans     134,206
Commercial      
Total      
Gross loans     4,198,173
Commercial | Pass      
Total      
Gross loans     3,830,847
Commercial | Special Mention      
Total      
Gross loans     171,442
Commercial | Substandard or Lower      
Total      
Gross loans     195,884
Commercial - unsecured      
Total      
Gross loans     248,528
Commercial - unsecured | Pass      
Total      
Gross loans     234,987
Commercial - unsecured | Special Mention      
Total      
Gross loans     9,665
Commercial - unsecured | Substandard or Lower      
Total      
Gross loans     3,876
Construction      
Total      
Gross loans     107,166
Construction | Pass      
Total      
Gross loans     100,808
Construction | Special Mention      
Total      
Gross loans     2,897
Construction | Substandard or Lower      
Total      
Gross loans     3,461
Construction - commercial      
Total      
Gross loans     769,560
Construction - commercial | Pass      
Total      
Gross loans     765,562
Construction - commercial | Special Mention      
Total      
Gross loans     1,322
Construction - commercial | Substandard or Lower      
Total      
Gross loans     2,676
Total construction (excluding construction - other)      
Total      
Gross loans     876,726
Total construction (excluding construction - other) | Pass      
Total      
Gross loans     866,370
Total construction (excluding construction - other) | Special Mention      
Total      
Gross loans     4,219
Total construction (excluding construction - other) | Substandard or Lower      
Total      
Gross loans     6,137
Commercial Loans, Commerical Mortgages, Constructions Loans      
Total      
Gross loans     $ 12,024,203
Percentage of total loans rated     100.00%
Commercial Loans, Commerical Mortgages, Constructions Loans | Pass      
Total      
Gross loans     $ 11,361,611
Percentage of total loans rated     94.50%
Commercial Loans, Commerical Mortgages, Constructions Loans | Special Mention      
Total      
Gross loans     $ 322,489
Percentage of total loans rated     2.70%
Commercial Loans, Commerical Mortgages, Constructions Loans | Substandard or Lower      
Total      
Gross loans     $ 340,103
Percentage of total loans rated     2.80%
Payment Activity, Aging Status [Member]      
2020      
Total 712,711 712,711  
2019      
Total 926,960 926,960  
2018      
Total 506,899 506,899  
2017      
Total 565,002 565,002  
2016      
Total 383,271 383,271  
Prior      
Total 764,601 764,601  
Revolving Loans Amortized Cost Basis      
Total 1,083,806 1,083,806  
Total      
Total 4,952,093 4,952,093  
Gross loans     $ 4,813,323
Percentage of total loans rated     100.00%
Payment Activity, Aging Status [Member] | Performing      
2020      
Total 711,185 711,185  
2019      
Total 926,325 926,325  
2018      
Total 503,819 503,819  
2017      
Total 546,009 546,009  
2016      
Total 382,315 382,315  
Prior      
Total 744,713 744,713  
Revolving Loans Amortized Cost Basis      
Total 1,075,394 1,075,394  
Total      
Total 4,898,188 4,898,188  
Gross loans     $ 4,705,746
Percentage of total loans rated     97.80%
Payment Activity, Aging Status [Member] | Delinquent      
Total      
Gross loans     $ 56,689
Percentage of total loans rated     1.20%
Payment Activity, Aging Status [Member] | Non-performing      
2020      
Total 1,526 1,526  
2019      
Total 635 635  
2018      
Total 3,080 3,080  
2017      
Total 18,993 18,993  
2016      
Total 956 956  
Prior      
Total 19,888 19,888  
Revolving Loans Amortized Cost Basis      
Total 8,412 8,412  
Total      
Total 53,905 53,905  
Gross loans     $ 50,888
Percentage of total loans rated     1.00%
Payment Activity, Aging Status [Member] | Real-estate - home equity      
2020      
Total 13,718 13,718  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2019      
Total 9,591 9,591  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2018      
Total 15,617 15,617  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2017      
Total 13,937 13,937  
Current period gross charge-offs   (117)  
Current period recoveries   0  
Current period net charge-offs   (117)  
2016      
Total 15,234 15,234  
Current period gross charge-offs   (23)  
Current period recoveries   0  
Current period net charge-offs   (23)  
Prior      
Total 148,058 148,058  
Current period gross charge-offs   (231)  
Current period recoveries   219  
Current period net charge-offs   (12)  
Revolving Loans Amortized Cost Basis      
Total 1,027,130 1,027,130  
Current period gross charge-offs   (374)  
Current period recoveries   42  
Current period net charge-offs   (332)  
Total      
Total 1,251,455 1,251,455  
Current period gross charge-offs   (745)  
Current period recoveries   261  
Current period net charge-offs   (484)  
Gross loans     $ 1,314,944
Payment Activity, Aging Status [Member] | Real-estate - home equity | Performing      
2020      
Total 13,718 13,718  
2019      
Total 9,591 9,591  
2018      
Total 15,464 15,464  
2017      
Total 13,681 13,681  
2016      
Total 15,006 15,006  
Prior      
Total 145,384 145,384  
Revolving Loans Amortized Cost Basis      
Total 1,018,865 1,018,865  
Total      
Total 1,239,464 1,239,464  
Gross loans     1,292,035
Payment Activity, Aging Status [Member] | Real-estate - home equity | Delinquent      
Total      
Gross loans     12,341
Payment Activity, Aging Status [Member] | Real-estate - home equity | Non-performing      
2020      
Total 0 0  
2019      
Total 0 0  
2018      
Total 153 153  
2017      
Total 256 256  
2016      
Total 228 228  
Prior      
Total 2,674 2,674  
Revolving Loans Amortized Cost Basis      
Total 8,265 8,265  
Total      
Total 11,991 11,991  
Gross loans     10,568
Payment Activity, Aging Status [Member] | Real estate - residential mortgage      
2020      
Total 554,061 554,061  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2019      
Total 661,609 661,609  
Current period gross charge-offs   (15)  
Current period recoveries   0  
Current period net charge-offs   (15)  
2018      
Total 314,451 314,451  
Current period gross charge-offs   (100)  
Current period recoveries   10  
Current period net charge-offs   (90)  
2017      
Total 441,250 441,250  
Current period gross charge-offs   (104)  
Current period recoveries   1  
Current period net charge-offs   (103)  
2016      
Total 320,532 320,532  
Current period gross charge-offs   (6)  
Current period recoveries   1  
Current period net charge-offs   (5)  
Prior      
Total 570,324 570,324  
Current period gross charge-offs   (197)  
Current period recoveries   185  
Current period net charge-offs   (12)  
Revolving Loans Amortized Cost Basis      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Total      
Total 2,862,227 2,862,227  
Current period gross charge-offs   (422)  
Current period recoveries   197  
Current period net charge-offs   (225)  
Gross loans     2,641,465
Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Performing      
2020      
Total 554,061 554,061  
2019      
Total 660,974 660,974  
2018      
Total 311,804 311,804  
2017      
Total 438,785 438,785  
2016      
Total 320,134 320,134  
Prior      
Total 553,448 553,448  
Revolving Loans Amortized Cost Basis      
Total 0 0  
Total      
Total 2,839,206 2,839,206  
Gross loans     2,584,763
Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Delinquent      
Total      
Gross loans     34,291
Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Non-performing      
2020      
Total 0 0  
2019      
Total 635 635  
2018      
Total 2,647 2,647  
2017      
Total 2,465 2,465  
2016      
Total 398 398  
Prior      
Total 16,876 16,876  
Revolving Loans Amortized Cost Basis      
Total 0 0  
Total      
Total 23,021 23,021  
Gross loans     22,411
Payment Activity, Aging Status [Member] | Consumer      
2020      
Total 58,202 58,202  
Current period gross charge-offs   0  
Current period recoveries   83  
Current period net charge-offs   83  
2019      
Total 115,866 115,866  
Current period gross charge-offs   (532)  
Current period recoveries   89  
Current period net charge-offs   (443)  
2018      
Total 115,780 115,780  
Current period gross charge-offs   (335)  
Current period recoveries   143  
Current period net charge-offs   (192)  
2017      
Total 54,150 54,150  
Current period gross charge-offs   (326)  
Current period recoveries   51  
Current period net charge-offs   (275)  
2016      
Total 31,058 31,058  
Current period gross charge-offs   (303)  
Current period recoveries   43  
Current period net charge-offs   (260)  
Prior      
Total 43,386 43,386  
Current period gross charge-offs   (591)  
Current period recoveries   625  
Current period net charge-offs   34  
Revolving Loans Amortized Cost Basis      
Total 47,168 47,168  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Total      
Total 465,610 465,610  
Current period gross charge-offs   (2,087)  
Current period recoveries   1,034  
Current period net charge-offs   (1,053)  
Gross loans     463,164
Payment Activity, Aging Status [Member] | Consumer | Performing      
2020      
Total 58,202 58,202  
2019      
Total 115,866 115,866  
2018      
Total 115,707 115,707  
2017      
Total 54,108 54,108  
2016      
Total 31,027 31,027  
Prior      
Total 43,344 43,344  
Revolving Loans Amortized Cost Basis      
Total 47,021 47,021  
Total      
Total 465,275 465,275  
Gross loans     457,556
Payment Activity, Aging Status [Member] | Consumer | Delinquent      
Total      
Gross loans     5,150
Payment Activity, Aging Status [Member] | Consumer | Non-performing      
2020      
Total 0 0  
2019      
Total 0 0  
2018      
Total 73 73  
2017      
Total 42 42  
2016      
Total 31 31  
Prior      
Total 42 42  
Revolving Loans Amortized Cost Basis      
Total 147 147  
Total      
Total 335 335  
Gross loans     458
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts      
2020      
Total 64,679 64,679  
Current period gross charge-offs   (228)  
Current period recoveries   61  
Current period net charge-offs   (167)  
2019      
Total 76,157 76,157  
Current period gross charge-offs   (460)  
Current period recoveries   39  
Current period net charge-offs   (421)  
2018      
Total 54,560 54,560  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2017      
Total 55,483 55,483  
Current period gross charge-offs   (95)  
Current period recoveries   66  
Current period net charge-offs   (29)  
2016      
Total 16,431 16,431  
Current period gross charge-offs   0  
Current period recoveries   2  
Current period net charge-offs   2  
Prior      
Total 2,833 2,833  
Current period gross charge-offs   (438)  
Current period recoveries   32  
Current period net charge-offs   (406)  
Revolving Loans Amortized Cost Basis      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Total      
Total 270,143 270,143  
Current period gross charge-offs   (1,221)  
Current period recoveries   200  
Current period net charge-offs   (1,021)  
Gross loans     299,397
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Performing      
2020      
Total 63,153 63,153  
2019      
Total 76,157 76,157  
2018      
Total 54,353 54,353  
2017      
Total 39,435 39,435  
2016      
Total 16,132 16,132  
Prior      
Total 2,537 2,537  
Total      
Total 251,767 251,767  
Gross loans     278,743
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Delinquent      
Total      
Gross loans     4,012
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Non-performing      
2020      
Total 1,526 1,526  
2019      
Total 0 0  
2018      
Total 207 207  
2017      
Total 16,048 16,048  
2016      
Total 299 299  
Prior      
Total 296 296  
Total      
Total 18,376 18,376  
Gross loans     16,642
Payment Activity, Aging Status [Member] | Construction - other      
2020      
Total 22,051 22,051  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2019      
Total 63,737 63,737  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2018      
Total 6,491 6,491  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2017      
Total 182 182  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2016      
Total 16 16  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Prior      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Revolving Loans Amortized Cost Basis      
Total 9,508 9,508  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Total      
Total 102,658 102,658  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Gross loans     94,353
Payment Activity, Aging Status [Member] | Construction - other | Performing      
2020      
Total 22,051 22,051  
2019      
Total 63,737 63,737  
2018      
Total 6,491 6,491  
2017      
Total 0 0  
2016      
Total 16 16  
Prior      
Total 0 0  
Revolving Loans Amortized Cost Basis      
Total 9,508 9,508  
Total      
Total 102,476 102,476  
Gross loans     92,649
Payment Activity, Aging Status [Member] | Construction - other | Delinquent      
Total      
Gross loans     895
Payment Activity, Aging Status [Member] | Construction - other | Non-performing      
2020      
Total 0 0  
2019      
Total 0 0  
2018      
Total 0 0  
2017      
Total 182 182  
2016      
Total 0 0  
Prior      
Total 0 0  
Revolving Loans Amortized Cost Basis      
Total 0 0  
Total      
Total 182 182  
Gross loans     809
Payment Activity, Aging Status [Member] | Consumer      
Total      
Gross loans     64,237
Payment Activity, Aging Status [Member] | Consumer | Performing      
Total      
Gross loans     63,582
Payment Activity, Aging Status [Member] | Consumer | Delinquent      
Total      
Gross loans     465
Payment Activity, Aging Status [Member] | Consumer | Non-performing      
Total      
Gross loans     190
Payment Activity, Aging Status [Member] | Consumer - indirect      
Total      
Gross loans     398,927
Payment Activity, Aging Status [Member] | Consumer - indirect | Performing      
Total      
Gross loans     393,974
Payment Activity, Aging Status [Member] | Consumer - indirect | Delinquent      
Total      
Gross loans     4,685
Payment Activity, Aging Status [Member] | Consumer - indirect | Non-performing      
Total      
Gross loans     $ 268
Portfolio Segment and Loan Class [Member]      
2020      
Total 2,887,043 2,887,043  
2019      
Total 1,742,615 1,742,615  
2018      
Total 1,409,508 1,409,508  
2017      
Total 1,375,101 1,375,101  
2016      
Total 1,253,391 1,253,391  
Prior      
Total 3,548,900 3,548,900  
Revolving Loans Amortized Cost Basis      
Total 1,549,223 1,549,223  
Total      
Total 13,776,385 13,776,385  
Portfolio Segment and Loan Class [Member] | Pass      
2020      
Total 2,804,144 2,804,144  
2019      
Total 1,725,526 1,725,526  
2018      
Total 1,358,670 1,358,670  
2017      
Total 1,293,015 1,293,015  
2016      
Total 1,198,608 1,198,608  
Prior      
Total 3,306,142 3,306,142  
Revolving Loans Amortized Cost Basis      
Total 1,415,651 1,415,651  
Total      
Total 13,110,980 13,110,980  
Portfolio Segment and Loan Class [Member] | Special Mention      
2020      
Total 52,713 52,713  
2019      
Total 15,271 15,271  
2018      
Total 29,092 29,092  
2017      
Total 38,946 38,946  
2016      
Total 31,823 31,823  
Prior      
Total 141,203 141,203  
Revolving Loans Amortized Cost Basis      
Total 63,379 63,379  
Total      
Total 373,295 373,295  
Portfolio Segment and Loan Class [Member] | Substandard or Lower      
2020      
Total 30,186 30,186  
2019      
Total 1,818 1,818  
2018      
Total 21,746 21,746  
2017      
Total 43,140 43,140  
2016      
Total 22,960 22,960  
Prior      
Total 101,555 101,555  
Revolving Loans Amortized Cost Basis      
Total 70,193 70,193  
Total      
Total 292,110 292,110  
Portfolio Segment and Loan Class [Member] | Real estate - construction      
2020      
Total 57,915 57,915  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2019      
Total 230,589 230,589  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2018      
Total 204,748 204,748  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2017      
Total 140,877 140,877  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2016      
Total 51,655 51,655  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Prior      
Total 134,423 134,423  
Current period gross charge-offs   (17)  
Current period recoveries   70  
Current period net charge-offs   53  
Revolving Loans Amortized Cost Basis      
Total 50,043 50,043  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Total      
Total 870,250 870,250  
Current period gross charge-offs   (17)  
Current period recoveries   70  
Current period net charge-offs   53  
Portfolio Segment and Loan Class [Member] | Real estate - construction | Pass      
2020      
Total 57,915 57,915  
2019      
Total 229,899 229,899  
2018      
Total 204,748 204,748  
2017      
Total 140,877 140,877  
2016      
Total 50,094 50,094  
Prior      
Total 126,187 126,187  
Revolving Loans Amortized Cost Basis      
Total 48,947 48,947  
Total      
Total 858,667 858,667  
Portfolio Segment and Loan Class [Member] | Real estate - construction | Special Mention      
2020      
Total 0 0  
2019      
Total 534 534  
2018      
Total 0 0  
2017      
Total 0 0  
2016      
Total 783 783  
Prior      
Total 2,635 2,635  
Revolving Loans Amortized Cost Basis      
Total 336 336  
Total      
Total 4,288 4,288  
Portfolio Segment and Loan Class [Member] | Real estate - construction | Substandard or Lower      
2020      
Total 0 0  
2019      
Total 156 156  
2018      
Total 0 0  
2017      
Total 0 0  
2016      
Total 778 778  
Prior      
Total 5,601 5,601  
Revolving Loans Amortized Cost Basis      
Total 760 760  
Total      
Total 7,295 7,295  
Portfolio Segment and Loan Class [Member] | Commercial and industrial      
2020      
Total 2,369,113 2,369,113  
Current period gross charge-offs   0  
Current period recoveries    
Current period net charge-offs   0  
2019      
Total 570,839 570,839  
Current period gross charge-offs   (107)  
Current period recoveries   39  
Current period net charge-offs   (68)  
2018      
Total 387,016 387,016  
Current period gross charge-offs   (9)  
Current period recoveries   242  
Current period net charge-offs   233  
2017      
Total 280,748 280,748  
Current period gross charge-offs   (55)  
Current period recoveries   63  
Current period net charge-offs   8  
2016      
Total 257,730 257,730  
Current period gross charge-offs   (334)  
Current period recoveries   43  
Current period net charge-offs   (291)  
Prior      
Total 687,587 687,587  
Current period gross charge-offs   (210)  
Current period recoveries   1,673  
Current period net charge-offs   1,463  
Revolving Loans Amortized Cost Basis      
Total 1,413,375 1,413,375  
Current period gross charge-offs   (13,664)  
Current period recoveries   2,652  
Current period net charge-offs   (11,012)  
Total      
Total 5,971,200 5,971,200  
Current period gross charge-offs   (14,379)  
Current period recoveries   4,712  
Current period net charge-offs   (9,667)  
Portfolio Segment and Loan Class [Member] | Commercial and industrial | Pass      
2020      
Total 2,286,984 2,286,984  
2019      
Total 559,728 559,728  
2018      
Total 362,758 362,758  
2017      
Total 257,780 257,780  
2016      
Total 230,120 230,120  
Prior      
Total 625,302 625,302  
Revolving Loans Amortized Cost Basis      
Total 1,285,256 1,285,256  
Total      
Total 5,611,340 5,611,340  
Portfolio Segment and Loan Class [Member] | Commercial and industrial | Special Mention      
2020      
Total 51,958 51,958  
2019      
Total 9,918 9,918  
2018      
Total 10,905 10,905  
2017      
Total 8,782 8,782  
2016      
Total 14,898 14,898  
Prior      
Total 37,112 37,112  
Revolving Loans Amortized Cost Basis      
Total 59,836 59,836  
Total      
Total 194,277 194,277  
Portfolio Segment and Loan Class [Member] | Commercial and industrial | Substandard or Lower      
2020      
Total 30,171 30,171  
2019      
Total 1,193 1,193  
2018      
Total 13,353 13,353  
2017      
Total 14,186 14,186  
2016      
Total 12,712 12,712  
Prior      
Total 25,173 25,173  
Revolving Loans Amortized Cost Basis      
Total 68,283 68,283  
Total      
Total 165,583 165,583  
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage      
2020      
Total 460,015 460,015  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
2019      
Total 941,187 941,187  
Current period gross charge-offs   (10)  
Current period recoveries   0  
Current period net charge-offs   (10)  
2018      
Total 817,744 817,744  
Current period gross charge-offs   (16)  
Current period recoveries   0  
Current period net charge-offs   (16)  
2017      
Total 953,476 953,476  
Current period gross charge-offs   (1,993)  
Current period recoveries   0  
Current period net charge-offs   (1,993)  
2016      
Total 944,006 944,006  
Current period gross charge-offs   (11)  
Current period recoveries   1  
Current period net charge-offs   (10)  
Prior      
Total 2,726,890 2,726,890  
Current period gross charge-offs   (1,132)  
Current period recoveries   338  
Current period net charge-offs   (794)  
Revolving Loans Amortized Cost Basis      
Total 85,805 85,805  
Current period gross charge-offs   (17)  
Current period recoveries   0  
Current period net charge-offs   (17)  
Total      
Total 6,934,935 6,934,935  
Current period gross charge-offs   (3,179)  
Current period recoveries   339  
Current period net charge-offs   (2,840)  
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Pass      
2020      
Total 459,245 459,245  
2019      
Total 935,899 935,899  
2018      
Total 791,164 791,164  
2017      
Total 894,358 894,358  
2016      
Total 918,394 918,394  
Prior      
Total 2,554,653 2,554,653  
Revolving Loans Amortized Cost Basis      
Total 81,448 81,448  
Total      
Total 6,640,973 6,640,973  
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Special Mention      
2020      
Total 755 755  
2019      
Total 4,819 4,819  
2018      
Total 18,187 18,187  
2017      
Total 30,164 30,164  
2016      
Total 16,142 16,142  
Prior      
Total 101,456 101,456  
Revolving Loans Amortized Cost Basis      
Total 3,207 3,207  
Total      
Total 174,730 174,730  
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Substandard or Lower      
2020      
Total 15 15  
2019      
Total 469 469  
2018      
Total 8,393 8,393  
2017      
Total 28,954 28,954  
2016      
Total 9,470 9,470  
Prior      
Total 70,781 70,781  
Revolving Loans Amortized Cost Basis      
Total 1,150 1,150  
Total      
Total 119,232 119,232  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member]      
Revolving Loans Amortized Cost Basis      
Total 8,843 8,843  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Performing      
Revolving Loans Amortized Cost Basis      
Total 8,428 8,428  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Non-performing      
Revolving Loans Amortized Cost Basis      
Total 415 415  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real-estate - home equity      
Revolving Loans Amortized Cost Basis      
Total 8,170 8,170  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real-estate - home equity | Performing      
Revolving Loans Amortized Cost Basis      
Total 7,755 7,755  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real-estate - home equity | Non-performing      
Revolving Loans Amortized Cost Basis      
Total 415 415  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real estate - residential mortgage      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Non-performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Consumer      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Consumer | Performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Consumer | Non-performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Non-performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Construction - other      
Revolving Loans Amortized Cost Basis      
Total 673 673  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Construction - other | Performing      
Revolving Loans Amortized Cost Basis      
Total 673 673  
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Construction - other | Non-performing      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member]      
Revolving Loans Amortized Cost Basis      
Total 10,604 10,604  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Pass      
Revolving Loans Amortized Cost Basis      
Total 9,224 9,224  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Special Mention      
Revolving Loans Amortized Cost Basis      
Total 868 868  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Substandard or Lower      
Revolving Loans Amortized Cost Basis      
Total 512 512  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction | Pass      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction | Special Mention      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction | Substandard or Lower      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial      
Revolving Loans Amortized Cost Basis      
Total 4,792 4,792  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial | Pass      
Revolving Loans Amortized Cost Basis      
Total 3,412 3,412  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial | Special Mention      
Revolving Loans Amortized Cost Basis      
Total 868 868  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial | Substandard or Lower      
Revolving Loans Amortized Cost Basis      
Total 512 512  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage      
Revolving Loans Amortized Cost Basis      
Total 5,812 5,812  
Current period gross charge-offs   0  
Current period recoveries   0  
Current period net charge-offs   0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Pass      
Revolving Loans Amortized Cost Basis      
Total 5,812 5,812  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Special Mention      
Revolving Loans Amortized Cost Basis      
Total 0 0  
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Substandard or Lower      
Revolving Loans Amortized Cost Basis      
Total $ 0 $ 0