Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 40,328	$ 40,425
Mortgage-backed securities ($12,004 and $24,911 at fair value pursuant to the fair value option at September 30, 2013 and December 31, 2012, respectively)	785,210	720,113
Other securities ($29,491 and $29,577 at fair value pursuant to the fair value option at September 30, 2013 and December 31, 2012 respectively)	273,344	229,453
Loans available for sale	5,485	5,313
Loans:
Loans Receivable	3,384,655	3,221,375
Net unamortized premiums and unearned loan fees	11,483	12,746
Allowance for loan losses	(30,816)	(31,104)
Net loans	3,365,322	3,203,017
Interest and dividends receivable	17,250	17,917
Bank premises and equipment, net	20,731	22,500
Federal Home Loan Bank of New York stock	46,003	42,337
Bank owned life insurance	108,762	106,244
Goodwill	16,127	16,127
Core deposit intangible	117	468
Other assets	53,586	47,502
Total assets	4,732,265	4,451,416
Due to depositors:
Non-interest bearing	180,661	155,789
Interest-bearing:
Certificate of deposit accounts	1,242,317	1,253,229
Savings accounts	277,417	288,398
Money market accounts	191,247	148,618
NOW accounts	1,306,664	1,136,599
Total interest-bearing deposits	3,017,645	2,826,844
Mortgagors' escrow deposits	41,064	32,560
Borrowed funds ($26,465 and $23,922 at fair value pursuant to the fair value option at September 30, 2013 and December 31, 2012, respectively)	852,931	763,105
Securities sold under agreements to repurchase	165,300	185,300
Other liabilities	47,652	45,453
Total liabilities	4,305,253	4,009,051
STOCKHOLDERS' EQUITY
Preferred stock ($0.01 par value; 5,000,000 shares authorized; None issued)
Common stock ($0.01 par value; 100,000,000 shares authorized; 31,530,595 shares issued at September 30, 2013 and December 31, 2012; 30,092,744 shares and 30,743,329 shares outstanding at September 30, 2013 and December 31, 2012, respectively)	315	315
Additional paid-in capital	200,987	198,314
September 30, 2013 and December 31, 2012, respectively)	(21,796)	(10,257)
Retained earnings	255,687	241,856
Accumulated other comprehensive income (loss), net of taxes	(8,181)	12,137
Total stockholders' equity	427,012	442,365
Total liabilities and stockholders' equity	4,732,265	4,451,416
Multi-Family Residential [Member]
ASSETS
Loans available for sale	485	3,442
Loans:
Loans Receivable	1,684,277	1,534,438
Commercial Real Estate Loans [Member]
Loans:
Loans Receivable	516,314	515,438
One-To-Four Family - Mixed-Use Property [Member]
ASSETS
Loans available for sale		1,871
Loans:
Loans Receivable	595,435	637,353
One-To-Four Family - Residential [Member]
Loans:
Loans Receivable	196,659	198,968
Co-Operative Apartments [Member]
Loans:
Loans Receivable	10,165	6,303
Construction [Member]
ASSETS
Loans available for sale	5,000
Loans:
Loans Receivable	4,645	14,381
Small Business Administration [Member]
Loans:
Loans Receivable	8,003	9,496
Taxi Medallion [Member]
Loans:
Loans Receivable	5,088	9,922
Commercial Business And Other [Member]
Loans:
Loans Receivable	$ 364,069	$ 295,076