XML 66 R46.htm IDEA: XBRL DOCUMENT
v3.20.2

Loans, Allowance for Credit Losses and Credit Quality Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | $ 1,504,307 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 1,047,533 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 970,908 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 758,331 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 1,445,238 |
Financing Receivable, Revolving | 1,454,822 |
Financing Receivable, after Allowance for Credit Loss | 2,199,885 |
Loans and Leases Receivable, Gross | 9,405,193 | $ 8,873,639
Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 877,770 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 561,699 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 616,367 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 428,865 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 806,109 |
Financing Receivable, Revolving | 39,998 |
Financing Receivable, after Allowance for Credit Loss | 778,315 |
Loans and Leases Receivable, Gross | 4,125,464 | 4,002,359
Commercial Real Estate [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 15,957 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 20,313 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 7,941 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 27,253 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 47,875 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 20,639 |
Loans and Leases Receivable, Gross | 139,978 |
Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 859,548 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 512,371 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 587,345 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 399,442 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 751,629 |
Financing Receivable, Revolving | 39,998 |
Financing Receivable, after Allowance for Credit Loss | 753,415 |
Loans and Leases Receivable, Gross | 3,920,089 |
Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 2,265 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 10,092 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 21,081 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 2,170 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 6,605 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 4,261 |
Loans and Leases Receivable, Gross | 46,474 |
Commercial Real Estate [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 18,923 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 18,923 |
Commercial Real Estate [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 0 |
Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 156,992 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 137,899 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 44,899 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 26,767 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 24,214 |
Financing Receivable, Revolving | 650,681 |
Financing Receivable, after Allowance for Credit Loss | 1,018,266 |
Loans and Leases Receivable, Gross | 2,062,345 | 1,395,036
Commercial And Industrial [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 2,302 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 7,833 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 4,573 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 1,219 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 318 |
Financing Receivable, Revolving | 15,248 |
Financing Receivable, after Allowance for Credit Loss | 2,560 |
Loans and Leases Receivable, Gross | 34,103 |
Commercial And Industrial [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 153,137 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 107,318 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 34,826 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 23,065 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 22,334 |
Financing Receivable, Revolving | 601,937 |
Financing Receivable, after Allowance for Credit Loss | 1,012,974 |
Loans and Leases Receivable, Gross | 1,958,168 |
Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 1,553 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 22,748 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 5,500 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 2,483 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 1,419 |
Financing Receivable, Revolving | 33,496 |
Financing Receivable, after Allowance for Credit Loss | 2,732 |
Loans and Leases Receivable, Gross | 69,931 |
Commercial And Industrial [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 143 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 143 |
Commercial And Industrial [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 205,772 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 79,338 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 66,406 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 6,750 |
Financing Receivable, Revolving | 31,700 |
Financing Receivable, after Allowance for Credit Loss | 182,291 |
Loans and Leases Receivable, Gross | 573,334 | 547,293
Construction Loans [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 9,352 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 5,037 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 328 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 14,717 |
Construction Loans [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 196,420 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 73,298 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 66,406 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 6,750 |
Financing Receivable, Revolving | 31,372 |
Financing Receivable, after Allowance for Credit Loss | 182,291 |
Loans and Leases Receivable, Gross | 557,614 |
Construction Loans [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 1,003 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 1,003 |
Construction Loans [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 0 |
Construction Loans [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 0 |
Small Business [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 29,184 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 20,900 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 14,807 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 15,381 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 23,599 |
Financing Receivable, Revolving | 36,120 |
Financing Receivable, after Allowance for Credit Loss | 27,641 |
Loans and Leases Receivable, Gross | 167,632 | 174,497
Small Business [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 10 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 16 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 10 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 755 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 232 |
Financing Receivable, Revolving | 736 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 1,759 |
Small Business [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 28,766 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 20,806 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 14,627 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 14,528 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 22,644 |
Financing Receivable, Revolving | 34,569 |
Financing Receivable, after Allowance for Credit Loss | 27,457 |
Loans and Leases Receivable, Gross | 163,397 |
Small Business [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 408 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 78 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 170 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 98 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 723 |
Financing Receivable, Revolving | 786 |
Financing Receivable, after Allowance for Credit Loss | 184 |
Loans and Leases Receivable, Gross | 2,447 |
Small Business [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 29 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 29 |
Small Business [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 0 |
Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 167,901 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 187,954 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 168,283 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 241,805 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 453,943 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 132,419 |
Loans and Leases Receivable, Gross | 1,352,305 | $ 1,590,569
Residential Real Estate [Member] | Default [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 760 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 235 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 167 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 4,724 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 728 |
Loans and Leases Receivable, Gross | 6,614 |
Residential Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 167,901 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 187,194 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 168,048 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 241,638 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 449,219 |
Financing Receivable, Revolving | 0 |
Financing Receivable, after Allowance for Credit Loss | 131,691 |
Loans and Leases Receivable, Gross | 1,345,691 |
Home Equity Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 66,238 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 59,534 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 59,387 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 44,817 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 122,852 |
Financing Receivable, Revolving | 683,828 |
Financing Receivable, after Allowance for Credit Loss | 60,274 |
Loans and Leases Receivable, Gross | 1,101,054 |
Home Equity Loan [Member] | Default [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 455 |
Financing Receivable, Revolving | 2,044 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 2,566 |
Home Equity Loan [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 66,238 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 59,534 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 59,387 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 44,817 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 122,397 |
Financing Receivable, Revolving | 681,784 |
Financing Receivable, after Allowance for Credit Loss | 60,274 |
Loans and Leases Receivable, Gross | 1,098,488 |
Consumer Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 450 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 209 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 759 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 696 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 7,771 |
Financing Receivable, Revolving | 12,495 |
Financing Receivable, after Allowance for Credit Loss | 679 |
Loans and Leases Receivable, Gross | 23,059 |
Consumer Loan [Member] | Default [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 0 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 20 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 0 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 34 |
Financing Receivable, Revolving | 2 |
Financing Receivable, after Allowance for Credit Loss | 0 |
Loans and Leases Receivable, Gross | 56 |
Consumer Loan [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year | 450 |
Financing Receivable, Originated Two Years before Latest Fiscal Year | 209 |
Financing Receivable, Originated Three Years before Latest Fiscal Year | 739 |
Financing Receivable, Originated Four Years before Latest Fiscal Year | 696 |
Financing Receivable, Originated Five or More Years before Latest Fiscal Year | 7,737 |
Financing Receivable, Revolving | 12,493 |
Financing Receivable, after Allowance for Credit Loss | 679 |
Loans and Leases Receivable, Gross | 23,003 |
Revolving converted to term [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 24,169 |
Revolving converted to term [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 16,341 |
Revolving converted to term [Member] | Commercial Real Estate [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 16,341 |
Revolving converted to term [Member] | Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Commercial Real Estate [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Commercial Real Estate [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 2,627 |
Revolving converted to term [Member] | Commercial And Industrial [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 50 |
Revolving converted to term [Member] | Commercial And Industrial [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 2,577 |
Revolving converted to term [Member] | Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Commercial And Industrial [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Commercial And Industrial [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 1,077 |
Revolving converted to term [Member] | Construction Loans [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Construction Loans [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 1,077 |
Revolving converted to term [Member] | Construction Loans [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Construction Loans [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Construction Loans [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Small Business [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Small Business [Member] | Potential Weakness [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Small Business [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Small Business [Member] | Definite Weakness Loss Unlikely [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Small Business [Member] | Partial Loss Probable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Small Business [Member] | Definite Loss [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Residential Real Estate [Member] | Default [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Residential Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 4,124 |
Revolving converted to term [Member] | Home Equity Loan [Member] | Default [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 67 |
Revolving converted to term [Member] | Home Equity Loan [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 4,057 |
Revolving converted to term [Member] | Consumer Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Consumer Loan [Member] | Default [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | 0 |
Revolving converted to term [Member] | Consumer Loan [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, Revolving | $ 0 |

X
- Definition Amount of financing receivable originated more than five years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated four years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in fiscal year prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated three years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated two years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable that can be withdrawn, repaid and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_PotentialWeaknessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_DefiniteWeaknessLossUnlikelyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_PartialLossProbableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_DefiniteLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=indb_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=indb_SmallBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=indb_DefaultMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=indb_RevolvingconvertedtotermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |