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OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES (Tables) | 12 Months Ended
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Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |
Summary of Financial Instruments Outstanding Whose Contract Amounts Represent Credit Risk | A summary of financial instruments outstanding whose contract amounts represent credit risk is as follows at year-end:
(In thousands) |  | 2016 |  | 2015
Commitments to originate new loans |  | $ | 243,519 |  |  | $ | 102,145 |
Unused funds on commercial and other lines of credit |  | 574,043 |  |  | 525,603 |
Unadvanced funds on home equity lines of credit |  | 281,621 |  |  | 258,897 |
Unadvanced funds on construction and real estate loans |  | 320,635 |  |  | 201,764 |
Standby letters of credit |  | 14,939 |  |  | 12,775 |
Lease obligation |  | 11,639 |  |  | 11,939 |
Total |  | $ | 1,446,396 |  |  | $ | 1,113,123 |

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