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LOANS - Loan Summary (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | --- | ---
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | $ 7,244,147 |  | $ 7,415,952 |  |  |
Allowance for credit losses | (51,750) | $ (55,069) | (60,869) | $ (64,437) | $ (55,652) | $ (49,911)
Net loans | 7,192,397 |  | 7,355,083 |  |  |
Commercial Portfolio Segment [Member] | Business Lending [Member] |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | 3,186,487 |  | 3,440,077 |  |  |
Allowance for credit losses | (23,417) | (27,042) | (28,190) | (24,204) | (19,489) | (19,426)
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | 2,408,499 |  |  |  |  |
Allowance for credit losses | (10,001) | (9,686) | (10,672) | (13,088) | (12,430) | (10,269)
Consumer Portfolio Segment [Member] | Consumer Mortgage [Member] |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | 2,408,499 |  | 2,401,499 |  |  |
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | 1,109,504 |  | 1,021,885 |  |  |
Allowance for credit losses | (11,103) | (11,120) | (13,696) | (15,866) | (13,694) | (13,712)
Consumer Portfolio Segment [Member] | Consumer Direct [Member] |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | 148,540 |  | 152,657 |  |  |
Allowance for credit losses | (2,548) | (2,682) | (3,207) | (4,028) | (3,737) | (3,255)
Consumer Portfolio Segment [Member] | Home Equity [Member] |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Gross loans, including deferred origination costs | 391,117 |  | 399,834 |  |  |
Allowance for credit losses | $ (1,796) | $ (1,543) | $ (2,222) | $ (2,690) | $ (2,484) | $ (2,129)

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for 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 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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