ACQUISITIONS (Details Textual) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended			0 Months Ended	12 Months Ended		0 Months Ended	3 Months Ended		12 Months Ended
	Nov. 09, 2012	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Nov. 09, 2012 Central Bankcorp, Inc. [Member]	Dec. 31, 2013 Central Bankcorp, Inc. [Member]	Nov. 15, 2013 Central Bankcorp, Inc. [Member]	Nov. 15, 2013 Mayflower Bankcorp, Inc. [Member]	Dec. 31, 2013 Mayflower Bankcorp, Inc. [Member]	Dec. 31, 2012 Mayflower Bankcorp, Inc. [Member]	Dec. 31, 2013 Mayflower Bankcorp, Inc. [Member]
Business Acquisition [Line Items]
Cost of acquired entity, cash paid per share option (in dollars per share)													$ 32.00			$ 17.50
Number of shares of company stock issued for each share of Central common stock (in shares)													1.0533		0.5650
Value of shares of company stock issued for each share of acquiree stock (in dollars per share)													$ 29.95			$ 20.28
Company's closing price per share (in dollars per share)													$ 28.44			$ 35.90
Business transaction value													$ 52,000,000			$ 40,300,000
Cost of acquired entity, percentage cash													40.00%			30.00%
Cost of acquired entity, percentage stock consideration													60.00%			70.00%
Cost of acquired entity, cash paid													21,600,000			10,900,000
Cost of acquired entity, stock consideration													30,400,000			29,400,000
Increase in acquirer outstanding shares													1,068,514			818,650
Merger and acquisition		6,219,000	366,000	754,000	1,345,000	5,474,000	595,000	672,000		8,685,000	6,741,000			1,800,000				6,700,000	6,900,000
Loans acquired													450,671,000			126,570,000
Proceeds from sale of loans acquired in acquisition	42,200,000
Pay down of Federal Home Loan Bank Advances	(24,991,000)
Finite-lived intangible asset acquired, useful life										9 years 10 months 24 days
Interest income attributable to acquired loans														3,100,000			641,000
Business Combination, Pro Forma Information [Abstract]
Acquisition related costs net of tax, excluded from pro forma results										$ 4,500,000	$ 4,500,000
Acquisition related costs per share, diluted, excluded from pro forma results (in dollars per share)										$ 0.19	$ 0.20