LOANS, Past Due (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Aging [Abstract]
Number of Real Estate Loans More Than 90 Days Past Due On Contractual Balloon Payment	1		5
Real Estate Loans More Than 90 Days Past Due On Contractual Balloon Payment	$ 190		$ 3,820
One-to Four-Family Residential and Cooperative Unit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	336		1,221
60 to 89 Days Past Due	155		0
Loans 90 Days or More Past Due and Still Accruing Interest	0		0
Non-accrual	938	[1]	2,205	[2]
Total Past Due	1,429		3,426
Current	90,447		97,286
Total Loans	91,876		100,712
Multifamily Residential and Residential Mixed Use [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	6,451		2,589
60 to 89 Days Past Due	0		0
Loans 90 Days or More Past Due and Still Accruing Interest	190		946
Non-accrual	507	[1]	7,069	[2]
Total Past Due	7,148		10,604
Current	2,669,221		2,592,315
Total Loans	2,676,369		2,602,919
Mixed Use Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	0		4,976
60 to 89 Days Past Due	0		0
Loans 90 Days or More Past Due and Still Accruing Interest	0		0
Non-accrual	1,170	[1]	5,591	[2]
Total Past Due	1,170		10,567
Current	338,963		327,703
Total Loans	340,133		338,270
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	207		478
60 to 89 Days Past Due	0		0
Loans 90 Days or More Past Due and Still Accruing Interest	0		2,874
Non-accrual	6,265	[1]	11,083	[2]
Total Past Due	6,472		14,435
Current	388,059		398,881
Total Loans	394,531		413,316
Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	0		0
60 to 89 Days Past Due	0		0
Loans 90 Days or More Past Due and Still Accruing Interest	0		0
Non-accrual	0	[1]	0	[2]
Total Past Due	0		0
Current	476		3,199
Total Loans	476		3,199
Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	6,994		9,264
60 to 89 Days Past Due	155		0
Loans 90 Days or More Past Due and Still Accruing Interest	190		3,820
Non-accrual	8,880	[1]	25,948	[2]
Total Past Due	16,219		39,032
Current	3,487,166		3,419,384
Total Loans	3,503,385		3,458,416
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 59 Days Past Due	2		12
60 to 89 Days Past Due	5		5
Loans 90 Days or More Past Due and Still Accruing Interest	0		0
Non-accrual	8	[1]	4	[2]
Total Past Due	15		21
Current	2,408		2,428
Total Loans	$ 2,423		$ 2,449

[1] (1) Includes all loans on non-accrual status regardless of the number of days such loans were delinquent as of December 31, 2012.

[2] 1) Includes all loans on non-accrual status regardless of the number of days such loans were delinquent as of December 31, 2011.