LOANS RECEIVABLE AND CREDIT QUALITY, Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014 Loan	Sep. 30, 2013 Loan	Dec. 31, 2013 Loan	Sep. 30, 2014 One To Four Family Residential And Cooperative Unit Allowance [Member] Loan	Dec. 31, 2013 One To Four Family Residential And Cooperative Unit Allowance [Member] Loan	Sep. 30, 2014 Multifamily Residential and Residential Mixed Use [Member] Loan	Dec. 31, 2013 Multifamily Residential and Residential Mixed Use [Member] Loan	Sep. 30, 2014 Mixed Use Commercial Real Estate [Member] Loan	Sep. 30, 2014 Mixed Use Commercial Real Estate [Member] Loan	Dec. 31, 2013 Mixed Use Commercial Real Estate [Member] Loan	Sep. 30, 2014 Commercial Real Estate [Member] Loan	Sep. 30, 2014 Commercial Real Estate [Member] Loan	Dec. 31, 2013 Commercial Real Estate [Member] Loan	Sep. 30, 2014 Total Real Estate Loans [Member] Loan	Sep. 30, 2014 Total Real Estate Loans [Member] Loan
Troubled Debt Restructuring On Receivables [Abstract]
Financing Receivable, Modifications, Number of Contracts	11		12	2	3	4	4		1	0		4	5
Financing Receivable, Modifications, Recorded Investment	$ 19,864		$ 24,327	$ 607	$ 934	$ 1,115	$ 1,148	$ 4,400	$ 4,400	$ 0	$ 13,742	$ 13,742	$ 22,245
Financing Receivables Modification Accrual Status Number Of Contracts	8		10
Financing Receivable Modification Recorded Investment In Accrual Status	10,747		18,620
Financing Receivables Modification Non Accrual Status Number Of Contracts	3		2
Financing Receivable Modification Recorded Investment In Non Accrual Status	9,117		5,707
Financing Receivable Modifications Number Of Contracts In Period								0	1		1	1		1	2
Financing Receivable Modifications Pre Modification Recorded Investment In Period								0	4,400		3,500	3,500		3,500	7,900
Financing Receivable Modifications Post Modification Recorded Investment In Period								0	4,400		3,500	3,500		3,500	7,900
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Allocated Reserves Recognized For Trouble Debt Restructuring Receivables That Defaulted	37		451
Reduction in allocated allowance on TDRS during the period											0	0
Number of troubled debt restructured loans for which allocated reserves were no longer deemed warranted											0	0
Premium paid on loans purchased during the period	13,163													0
Allocated reserve on new TDR eliminated								$ 0	$ 0