ACQUISITIONS (Tables) (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Nov. 15, 2013

Nov. 09, 2012

Business Acquisition [Line Items]

Certain Loans Acquired in Transfer, Nonaccretable Difference

$ (1,296)

$ (8,733)

Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition:

	Net Assets Acquired at Fair Value
	(Dollars in thousands)
Assets
Cash	$	21,390
Investments	77,953
Loans	126,570
Premises and equipment	7,128
Goodwill	20,030
Core deposit intangible	2,610
Other assets	7,104
Total assets acquired	262,785
Liabilities
Deposits	218,877
Borrowings	1,121
Other liabilities	2,527
Total liabilities assumed	222,525
Purchase price	$	40,260

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition:

	Net Assets Acquired at Fair Value
	(Dollars in thousands)
Assets
Cash	$	12,683
Investments	28,268
Loans	450,671
Premises and equipment	6,277
Goodwill	22,544
Core deposit intangible	2,150
Other assets	37,309
Total assets acquired	559,902
Liabilities
Deposits	357,434
Borrowings	144,920
Other liabilities	5,511
Total liabilities assumed	507,865
Purchase price	$	52,037

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block]

The following table displays certain information pertaining to purchased credit impaired loans at the dates indicated:

		Mayflower Acquisition		Central Acquisition
		November 15, 2013		November 9, 2012
		(Dollars in thousands)
Contractually required principal and interest payments receivable	(1)	$	4,440	$	47,548
Less: expected cash flows	(1)	3,144		38,815
Initial nonaccretable difference		$	1,296	$	8,733
Expected cash flows	(1)	$	3,144	$	38,815
Less: fair value (initial carrying amount)		2,758		35,720
Accretable Yield		$	386	$	3,095

(1) Reflective of anticipated prepayments.

The following is a summary of these PCI loans associated with the acquisition:

	(Dollars in thousands)
Contractually required principal and interest at acquisition	$	47,548
Contractual cash flows not expected to be collected	(8,733		)
Expected cash flows at acquisition	38,815
Interest component of expected cash flows	(3,095		)
Basis in PCI loans at acquisition - estimated fair value	$	35,720

Schedule of Pro Forma Results of Operations

The following summarizes the unaudited pro forma results of operations as if the Company acquired Mayflower on January 1, 2013 (2012 amounts represent combined results for the Company and Mayflower). The selected pro forma financial information is presented for illustrative purposes only and is not necessarily indicative of the financial results of the combined companies had the acquisition actually been completed at the beginning of the periods presented, nor does it indicate future results for any other interim or full-year period.

	Years Ended December 31
	2013		2012
	(Dollars in thousands)
Net interest income after provision for loan losses	$	178,556	$	162,781
Net income	55,103		44,133

The following summarizes the unaudited pro forma results of operations as if the Company acquired Central on January 1, 2012 (2011 amounts represent combined results for the Company and Central). The selected pro forma financial information is presented for illustrative purposes only and is not necessarily indicative of the financial results of the combined companies had the acquisition actually been completed at the beginning of the periods presented, nor does it indicate future results for any other interim or full-year period.

	Years Ended December 31
	2012		2011
	(Dollars in thousands)
Net interest income after provision for loan losses	$	165,860	$	170,514
Net income	47,261		46,477

Mayflower Bankcorp, Inc. [Member]

Business Acquisition [Line Items]

Certain Loans Acquired in Transfer, Nonaccretable Difference

(1,296)

Central Bankcorp, Inc. [Member]

Business Acquisition [Line Items]

Certain Loans Acquired in Transfer, Nonaccretable Difference

$ (8,733)