LOANS RECEIVABLE AND CREDIT QUALITY, Past Due Financing Receivbles (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 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	2		5
Loans 90 Days or More Past Due And Still Accruing Pending Refinancing	$ 2,400		$ 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	117		143
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0		302
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	1,363	[1]	1,242	[2]
Financing Receivable, Recorded Investment, Past Due, Total	1,480		1,687
Financing Receivable, Recorded Investment, Current	74,096		72,269
Loans and Leases Receivable, Other, Net of Deferred Income	75,576		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	415		744
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	573		0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	159		1,031
Non-accrual	1,039	[1]	1,197	[2]
Financing Receivable, Recorded Investment, Past Due, Total	2,186		2,972
Financing Receivable, Recorded Investment, Current	3,217,521		2,919,578
Loans and Leases Receivable, Other, Net of Deferred Income	3,219,707		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	337,957		371,510
Loans and Leases Receivable, Other, Net of Deferred Income	342,357		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	2,241		0
Non-accrual	4,717	[1]	5,707	[2]
Financing Receivable, Recorded Investment, Past Due, Total	6,958		6,111
Financing Receivable, Recorded Investment, Current	406,664		318,585
Loans and Leases Receivable, Other, Net of Deferred Income	413,622		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	0		268
Loans and Leases Receivable, Other, Net of Deferred Income	0		268
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	5		6
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	3		4
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0
Non-accrual	8	[1]	3	[2]
Financing Receivable, Recorded Investment, Past Due, Total	16		13
Financing Receivable, Recorded Investment, Current	1,897		2,126
Loans and Leases Receivable, Other, Net of Deferred Income	1,913		2,139
Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	532		1,291
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	573		302
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,400		1,031
Non-accrual	11,519	[1]	12,546	[2]
Financing Receivable, Recorded Investment, Past Due, Total	15,024		15,170
Financing Receivable, Recorded Investment, Current	4,036,238		3,682,210
Loans and Leases Receivable, Other, Net of Deferred Income	$ 4,051,262		$ 3,697,380

[1] Includes all loans on non-accrual status regardless of the number of days such loans were delinquent as of September 30, 2014.

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