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OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES - Summary of Financial Instruments Outstanding Whose Contract Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial commitments whose contractual amount represents credit risk
Total	$ 1,835,422	$ 1,808,643
Commitments to originate new loans
Financial commitments whose contractual amount represents credit risk
Total	143,812	202,789
Unused funds on commercial and other lines of credit
Financial commitments whose contractual amount represents credit risk
Total	850,761	831,853
Unadvanced funds on home equity lines of credit
Financial commitments whose contractual amount represents credit risk
Total	384,723	332,359
Unadvanced funds on construction and real estate loans
Financial commitments whose contractual amount represents credit risk
Total	440,599	424,347
Standby letters of credit
Financial commitments whose contractual amount represents credit risk
Total	15,527	17,295
Discontinued Operations | Commitments to originate new loans
Financial commitments whose contractual amount represents credit risk
Total	$ 132,700	$ 134,500

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The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

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