ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR FIRST LOSS POSITION (1) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2010		Dec. 31, 2012 One-to Four-Family Residential and Cooperative Unit [Member]		Dec. 31, 2011 One-to Four-Family Residential and Cooperative Unit [Member]		Dec. 31, 2012 Multifamily Residential And Residential Mixed Use Allowance [Member]		Dec. 31, 2011 Multifamily Residential And Residential Mixed Use Allowance [Member]		Dec. 31, 2012 Mixed Use Commercial Real Estate [Member]		Dec. 31, 2011 Mixed Use Commercial Real Estate [Member]		Dec. 31, 2012 Commercial Real Estate [Member]		Dec. 31, 2011 Commercial Real Estate [Member]		Dec. 31, 2012 Construction [Member]		Dec. 31, 2011 Construction [Member]		Dec. 31, 2012 Total Real Estate Receivable [Member]		Dec. 31, 2011 Total Real Estate Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance			$ 1,079		$ 1,136		$ 2,767		$ 10,709		$ 1,900		$ 5,780		$ 33,416		$ 14,317		$ 0		$ 0		$ 39,162		$ 31,942
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance			258		1,773		0		776		0		1,145		15,276		39,296		0		0		15,534		42,990
Impaired Financing Receivable, with No Related Allowance, Recorded Investment			1,079	[1]	1,136	[1]	2,460	[1]	9,338	[1]	1,900	[1]	5,780	[1]	32,217	[1]	11,812	[1]	0	[1]	0	[1]	37,656	[1]	28,066	[1]
Impaired Financing Receivable, with Related Allowance, Recorded Investment			212	[1]	1,411	[1]	0	[1]	690	[1]	0	[1]	959	[1]	15,276	[1]	39,258	[1]	0	[1]	0	[1]	15,488	[1]	42,318	[1]
Impaired Financing Receivable, with No Allocated Reserves Within Allowance For Loan Losses Recognized For Impaired Receivables			0		0		0		0		0		0		0		0		0		0		0		0
Impaired Financing Receivable, with Allocated Reserves Within Allowance For Loan Losses Recognized For Impaired Receivables			7		130		0		45		0		73		513		1,927		0		0		520		2,175
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	8,945	[1]	867	[1]	1,406	[1]	5,434	[1]	11,194	[1]	2,516	[1]	3,901	[1]	29,362	[1]	15,243	[1]	0	[1]	3,835	[1]	38,179	[1]	35,579	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	22,915	[1]	452	[1]	565	[1]	420	[1]	3,040	[1]	192	[1]	1,893	[1]	20,087	[1]	15,620	[1]	0	[1]	0	[1]	21,151	[1]	21,118	[1]
Impaired Financing Receivable, with No Related Allowance, Interest Income	2,628		55		38		341		795		74		191		1,675		407		0		227		2,145		1,658
Impaired Financing Receivable, with Related Allowance, Interest Income	0		19		31		0		86		0		11		746		868		0		0		765		996
Average total impaired loans in period	31,860
Total interest income on all impaired loans during the period	$ 2,628

[1] (1)The recorded investment excludes accrued interest receivable and loan origination fees, net, due to immateriality.