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Internal Risk Rating Categories for Commercial Portfolio (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] $ 2,341,745 $ 3,041,156  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 2,555,672 2,562,886  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 2,115,126 1,828,783  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 1,675,310 1,005,371  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 812,408 972,045  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 3,073,487 2,766,394  
Financing Receivable, Revolving [1] 1,696,148 1,743,381  
Financing Receivable, Allowance for Credit Loss, Writeoff 34,782 2,652 $ 4,944
Financing Receivable, Revolving, Writeoff 23,893    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 83    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 2,783    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 40    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 5,163    
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff 2,766    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 54    
Financing Receivable, Allowance for Credit Loss [1] 14,278,070 13,928,675  
Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving [1] 8,174 8,659  
Commercial and Industrial [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 335,947 357,261  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 167,000 140,438  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 88,412 114,223  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 73,951 62,298  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 46,806 79,858  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 113,916 18,820  
Financing Receivable, Revolving 753,864 859,040  
Financing Receivable, Allowance for Credit Loss, Writeoff 23,564 0 3,474
Financing Receivable, Revolving, Writeoff 23,439    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 34    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 91    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Allowance for Credit Loss 1,579,986 1,635,103  
Commercial and Industrial [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 90 3,165  
Commercial Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,216,369 1,361,967  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,252,848 1,556,779  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,374,539 1,258,498  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,294,792 742,027  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 610,148 757,909  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 2,210,093 2,037,904  
Financing Receivable, Revolving 79,360 44,477  
Financing Receivable, Allowance for Credit Loss, Writeoff 7,855 62 0
Financing Receivable, Revolving, Writeoff 0    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 2,783    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 5,072    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Allowance for Credit Loss 8,041,508 7,760,230  
Commercial Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 3,359 669  
Construction Loans [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 203,106 556,912  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 407,498 338,827  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 151,142 173,185  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 44,953 56,693  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 23,823 3,135  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,561 1,588  
Financing Receivable, Revolving 17,503 23,122  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0 0
Financing Receivable, Revolving, Writeoff 0    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Allowance for Credit Loss 849,586 1,154,413  
Construction Loans [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving   951  
Small Business [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 51,264 55,015  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 51,439 45,061  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 39,525 31,841  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 26,272 16,954  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 12,944 10,073  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 23,265 19,409  
Financing Receivable, Revolving 47,247 40,749  
Financing Receivable, Allowance for Credit Loss, Writeoff 484 196 219
Financing Receivable, Revolving, Writeoff 390    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 40    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 54    
Financing Receivable, Allowance for Credit Loss 251,956 219,102  
Small Business [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Residential Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 505,517 665,407  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 638,223 419,665  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 405,386 194,615  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 184,833 94,223  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 89,327 94,425  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 601,468 567,189  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0 $ 0
Financing Receivable, Revolving, Writeoff 0    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Allowance for Credit Loss 2,424,754 2,035,524  
Residential Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Home Equity Loan [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 28,903 43,917  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 38,401 60,103  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 54,944 54,802  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 49,803 32,136  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 29,103 26,414  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 121,349 118,450  
Financing Receivable, Revolving 770,398 749,054  
Financing Receivable, Allowance for Credit Loss, Writeoff 47    
Financing Receivable, Revolving, Writeoff 47    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff 0    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff 0    
Financing Receivable, Allowance for Credit Loss 1,097,626 1,088,750  
Home Equity Loan [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 4,725 3,874  
Consumer Loan [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 639 677  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 263 2,013  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 1,178 1,619  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 706 1,040  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 257 231  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 1,835 3,034  
Financing Receivable, Revolving [1] 27,776 26,939  
Financing Receivable, Allowance for Credit Loss, Writeoff [1] 2,832    
Financing Receivable, Revolving, Writeoff [1] 17    
Financing Receivable, Revolving, Converted to Term Loan, Writeoff [1] 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff [1] 49    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff [1] 0    
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff [1] 0    
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff [1] 0    
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff [1] 2,766    
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff [1] 0    
Financing Receivable, Allowance for Credit Loss [1] 32,654 35,553  
Consumer Loan [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving [1] 0 0  
Pass [Member] | Commercial and Industrial [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 329,892 350,036  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 165,003 137,832  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 86,982 113,020  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 64,483 59,936  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 45,867 79,391  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 110,135 18,197  
Financing Receivable, Revolving 692,918 815,128  
Financing Receivable, Allowance for Credit Loss 1,495,370 1,576,705  
Pass [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 90 3,165  
Pass [Member] | Commercial Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,116,730 1,277,333  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,197,017 1,487,333  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,300,140 1,213,984  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,276,967 723,794  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 592,058 696,166  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 2,078,644 1,833,099  
Financing Receivable, Revolving 79,360 44,477  
Financing Receivable, Allowance for Credit Loss 7,644,275 7,276,855  
Pass [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 3,359 669  
Pass [Member] | Construction Loans [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 180,045 504,932  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 381,352 327,194  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 127,431 169,838  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 44,953 56,693  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 23,823 3,135  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 1,561 1,588  
Financing Receivable, Revolving 17,503 23,122  
Financing Receivable, Allowance for Credit Loss 776,668 1,087,453  
Pass [Member] | Construction Loans [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving   951  
Pass [Member] | Small Business [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 50,734 54,876  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 51,157 44,811  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 39,435 31,051  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 25,643 16,588  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 12,944 9,882  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 22,412 18,891  
Financing Receivable, Revolving 46,130 39,434  
Financing Receivable, Allowance for Credit Loss 248,455 215,533  
Pass [Member] | Small Business [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Pass [Member] | Residential Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 505,517 665,407  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 638,223 419,665  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 405,386 193,886  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 184,833 94,065  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 88,473 94,425  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 598,562 565,246  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 2,420,994 2,032,694  
Pass [Member] | Residential Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Pass [Member] | Home Equity Loan [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 28,903 43,917  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 38,401 60,103  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 54,944 54,802  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 49,803 32,014  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 29,103 26,414  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 121,286 118,367  
Financing Receivable, Revolving 770,074 748,294  
Financing Receivable, Allowance for Credit Loss 1,097,097 1,087,785  
Pass [Member] | Home Equity Loan [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 4,583 3,874  
Pass [Member] | Consumer Loan [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 639 677  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 263 2,013  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 1,178 1,619  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 706 1,022  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 256 231  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1] 1,835 3,023  
Financing Receivable, Revolving [1] 27,769 26,939  
Financing Receivable, Allowance for Credit Loss [1] 32,646 35,524  
Pass [Member] | Consumer Loan [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving [1] 0 0  
Potential weakness [Member] | Commercial and Industrial [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 4,188 4,836  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 668 925  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 528 1,023  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 9,358 1,744  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 22 467  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 121 623  
Financing Receivable, Revolving 28,218 17,122  
Financing Receivable, Allowance for Credit Loss 43,103 26,740  
Potential weakness [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Potential weakness [Member] | Commercial Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 62,337 42,005  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 37,510 65,603  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 51,555 39,740  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 13,269 14,167  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,859 58,190  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 118,526 183,468  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 285,056 403,173  
Potential weakness [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Potential weakness [Member] | Construction Loans [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 12,106 33,000  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year   1,775  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 5,292 3,347  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 17,398 38,122  
Potential weakness [Member] | Construction Loans [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Potential weakness [Member] | Small Business [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year   152  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year   373  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 154 366  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year   191  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 184 117  
Financing Receivable, Revolving 314 686  
Financing Receivable, Allowance for Credit Loss 652 1,885  
Potential weakness [Member] | Small Business [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite weakness [Member] | Commercial and Industrial [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 1,867 2,389  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,329 1,681  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 902 180  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 110 618  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 917    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 3,660    
Financing Receivable, Revolving 32,728 3,623  
Financing Receivable, Allowance for Credit Loss 41,513 8,491  
Definite weakness [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite weakness [Member] | Commercial Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 37,302 42,629  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 18,321 3,843  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 22,844 4,774  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 4,556 4,066  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 7,881 3,553  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 12,923 21,162  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 103,827 80,027  
Definite weakness [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite weakness [Member] | Construction Loans [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 10,955 18,980  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 26,146 9,858  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 18,419 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 55,520 28,838  
Definite weakness [Member] | Construction Loans [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite weakness [Member] | Small Business [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 530 139  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 282 98  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 90 417  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 475    
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 669 401  
Financing Receivable, Revolving 803 629  
Financing Receivable, Allowance for Credit Loss 2,849 1,684  
Definite weakness [Member] | Small Business [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Parital loss probable [Member] | Commercial and Industrial [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 23,167  
Financing Receivable, Allowance for Credit Loss 0 23,167  
Parital loss probable [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Parital loss probable [Member] | Commercial Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 8,350 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 175  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 8,350 175  
Parital loss probable [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Parital loss probable [Member] | Construction Loans [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 0 0  
Parital loss probable [Member] | Construction Loans [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Parital loss probable [Member] | Small Business [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 0 0  
Parital loss probable [Member] | Small Business [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite loss [Member] | Commercial and Industrial [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 0 0  
Definite loss [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite loss [Member] | Commercial Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 0 0  
Definite loss [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite loss [Member] | Construction Loans [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 0 0  
Definite loss [Member] | Construction Loans [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Definite loss [Member] | Small Business [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 0 0  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 0 0  
Definite loss [Member] | Small Business [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Default [Member] | Residential Real Estate [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year   729  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 158  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 854 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 2,906 1,943  
Financing Receivable, Revolving 0 0  
Financing Receivable, Allowance for Credit Loss 3,760 2,830  
Default [Member] | Residential Real Estate [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 0 0  
Default [Member] | Home Equity Loan [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0 122  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 0 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 63 83  
Financing Receivable, Revolving 324 760  
Financing Receivable, Allowance for Credit Loss 529 965  
Default [Member] | Home Equity Loan [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving 142    
Default [Member] | Consumer Loan [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Year One, Originated, Current Fiscal Year [1] 0 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year [1] 0 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year [1] 0 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year [1] 0 18  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year [1] 1 0  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year [1]   11  
Financing Receivable, Revolving [1] 7    
Financing Receivable, Allowance for Credit Loss [1] 8 29  
Default [Member] | Consumer Loan [Member] | Revolving converted to term [Member]      
Internal risk-rating categories for the Company's commercial portfolio      
Financing Receivable, Revolving [1] $ 0 $ 0  
[1]
(2)Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances and the associated gross write-offs.