ACQUISITIONS Mayflower - Net Assets Acquired at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Nov. 15, 2013 Mayflower Bankcorp, Inc. [Member]
Business Acquisition [Line Items]
Cash					$ 21,390
Investments					77,953
Loans					126,570
Premises and equipment					7,128
Goodwill	170,421	150,391	130,074	129,617	20,030
Core deposit intangible					2,610
Other assets					7,104
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets					262,785
Deposits					218,877
Borrowings					1,121
Other liabilities					2,527
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities					222,525
Purchase price					$ 40,260