LOANS RECEIVABLE AND CREDIT QUALITY, Past Due Financing Receivbles (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014 Loan		Dec. 31, 2013 Loan
Financing Receivable, Recorded Investment, Aging [Abstract]
Number Of Loans 90 Days or More Past Due And Still Accruing Pending Refinancing	7		5
Loans 90 Days or More Past Due And Still Accruing Pending Refinancing	$ 2,699		$ 1,031
One To Four Family Residential And Cooperative Unit Allowance [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	264		143
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	200		302
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	1,382	[1]	1,242	[2]
Financing Receivable, Recorded Investment, Past Due, Total	1,846		1,687
Financing Receivable, Recorded Investment, Current	74,926		72,269
Loans and Leases Receivable, Other, Net of Deferred Income	76,772		73,956
Multifamily Residential and Residential Mixed Use [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0		744
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0		0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,699		1,031
Non-accrual	1,271	[1]	1,197	[2]
Financing Receivable, Recorded Investment, Past Due, Total	3,970		2,972
Financing Receivable, Recorded Investment, Current	3,172,159		2,919,578
Loans and Leases Receivable, Other, Net of Deferred Income	3,176,129		2,922,550
Mixed Use Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0		0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0		0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	4,400	[1]	4,400	[2]
Financing Receivable, Recorded Investment, Past Due, Total	4,400		4,400
Financing Receivable, Recorded Investment, Current	303,403		371,510
Loans and Leases Receivable, Other, Net of Deferred Income	307,803		375,910
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0		404
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0		0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	5,707	[1]	5,707	[2]
Financing Receivable, Recorded Investment, Past Due, Total	5,707		6,111
Financing Receivable, Recorded Investment, Current	376,888		318,585
Loans and Leases Receivable, Other, Net of Deferred Income	382,595		324,696
Construction Loan Receivable [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0		0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0		0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	0	[1]	0	[2]
Financing Receivable, Recorded Investment, Past Due, Total	0		0
Financing Receivable, Recorded Investment, Current	222		268
Loans and Leases Receivable, Other, Net of Deferred Income	222		268
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	1		6
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	5		4
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	16	[1]	3	[2]
Financing Receivable, Recorded Investment, Past Due, Total	22		13
Financing Receivable, Recorded Investment, Current	1,851		2,126
Loans and Leases Receivable, Other, Net of Deferred Income	1,873		2,139
Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	264		1,291
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	200		302
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,699		1,031
Non-accrual	12,760	[1]	12,546	[2]
Financing Receivable, Recorded Investment, Past Due, Total	15,923		15,170
Financing Receivable, Recorded Investment, Current	3,927,598		3,682,210
Loans and Leases Receivable, Other, Net of Deferred Income	$ 3,943,521		$ 3,697,380

[1] Includes all loans on non-accrual status regardless of the number of days such loans were delinquent as of March 31, 2014.

[2] Includes all loans on non-accrual status regardless of the number of days such loans were delinquent as of December 31, 2013.