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OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financial commitments whose contractual amount represents credit risk |  |
Total | $ 1,446,396 | $ 1,113,123
Commitments to originate new loans |  |
Financial commitments whose contractual amount represents credit risk |  |
Total | 243,519 | 102,145
Unused funds on commercial and other lines of credit |  |
Financial commitments whose contractual amount represents credit risk |  |
Total | 574,043 | 525,603
Unadvanced funds on home equity lines of credit |  |
Financial commitments whose contractual amount represents credit risk |  |
Total | 281,621 | 258,897
Unadvanced funds on construction and real estate loans |  |
Financial commitments whose contractual amount represents credit risk |  |
Total | 320,635 | 201,764
Standby letters of credit |  |
Financial commitments whose contractual amount represents credit risk |  |
Total | 14,939 | 12,775
Lease obligation |  |
Financial commitments whose contractual amount represents credit risk |  |
Total | $ 11,639 | $ 11,939

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