BORROWINGS (Maturities of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Wholesale Repurchase Agreements [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	$ 0
2015	50,000
2016	0
2017	0
2018	0
Thereafter	0
Total	50,000
Junior Subordinated Debentures [Member] | Capital Trust V Preferred Securities Due in 2037 [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	51,547
Total	51,547
Junior Subordinated Debentures [Member] | Slades Ferry Trust I Preferred Securities Due in 2034 [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	10,310
Total	10,310
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust I Securities Due in 2034 [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	5,258
Total	5,258
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust II Securities Due in 2037 [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	6,791
Total	6,791
Subordinated Debentures [Member] | Subordinated Debentures Due August 27, 2018 [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	30,000
Total	$ 30,000