OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financial commitments whose contractual amount represents credit risk
Total commitments	$ 1,015,696	$ 1,064,694
Commitments to originate new loans
Financial commitments whose contractual amount represents credit risk
Total commitments	67,817	129,699
Unused funds on commercial and other lines of credit
Financial commitments whose contractual amount represents credit risk
Total commitments	514,179	523,090
Unadvanced funds on home equity lines of credit
Financial commitments whose contractual amount represents credit risk
Total commitments	225,731	226,330
Unadvanced funds on construction and real estate loans
Financial commitments whose contractual amount represents credit risk
Total commitments	183,301	158,131
Standby letters of credit
Financial commitments whose contractual amount represents credit risk
Total commitments	12,462	14,996
Lease obligation
Financial commitments whose contractual amount represents credit risk
Total commitments	$ 12,206	$ 12,448