Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 42,196	$ 40,425
Securities available for sale:
Mortgage-backed securities ($15,040 and $24,911 at fair value pursuant to the fair value option at June 30, 2013 and December 31, 2012, respectively)	782,388	720,113
Other securities ($29,792 and $29,577 at fair value pursuant to the fair value option at June 30, 2013 and December 31, 2012 respectively)	258,335	229,453
Loans available for sale	335	5,313
Loans:
Loans Receivable	3,276,086	3,221,375
Net unamortized premiums and unearned loan fees	12,016	12,746
Allowance for loan losses	(32,355)	(31,104)
Net loans	3,255,747	3,203,017
Interest and dividends receivable	17,380	17,917
Bank premises and equipment, net	21,380	22,500
Federal Home Loan Bank of New York stock	47,420	42,337
Bank owned life insurance	107,910	106,244
Goodwill	16,127	16,127
Core deposit intangible	234	468
Other assets	49,764	47,502
Total assets	4,599,216	4,451,416
Due to depositors:
Non-interest bearing	173,953	155,789
Interest-bearing:
Certificate of deposit accounts	1,165,157	1,253,229
Savings accounts	272,151	288,398
Money market accounts	197,123	148,618
NOW accounts	1,221,346	1,136,599
Total interest-bearing deposits	2,855,777	2,826,844
Mortgagors' escrow deposits	40,805	32,560
Borrowed funds ($26,192 and $23,922 at fair value pursuant to the fair value option at June 30, 2013 and December 31, 2012, respectively)	883,864	763,105
Securities sold under agreements to repurchase	175,300	185,300
Other liabilities	46,792	45,453
Total liabilities	4,176,491	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 June 30, 2013 and December 31, 2012; 30,103,613 shares and 30,743,329 shares outstanding at June 30, 2013 and December 31, 2012, respectively)	315	315
Additional paid-in capital	200,278	198,314
Treasury stock, at average cost (1,426,982 shares and 787,266 shares at June 30, 2013 and December 31, 2012, respectively)	(20,979)	(10,257)
Retained earnings	250,192	241,856
Accumulated other comprehensive income (loss), net of taxes	(7,081)	12,137
Total stockholders' equity	422,725	442,365
Total liabilities and stockholders' equity	4,599,216	4,451,416
Multi-Family Residential [Member]
Securities available for sale:
Loans available for sale		3,442
Loans:
Loans Receivable	1,607,090	1,534,438
Commercial Real Estate Loans [Member]
Loans:
Loans Receivable	526,063	515,438
One-To-Four Family - Mixed-Use Property [Member]
Securities available for sale:
Loans available for sale	335	1,871
Loans:
Loans Receivable	605,254	637,353
One-To-Four Family - Residential [Member]
Loans:
Loans Receivable	196,318	198,968
Co-Operative Apartments [Member]
Loans:
Loans Receivable	9,335	6,303
Construction [Member]
Loans:
Loans Receivable	11,450	14,381
Small Business Administration [Member]
Loans:
Loans Receivable	8,565	9,496
Taxi Medallion [Member]
Loans:
Loans Receivable	5,114	9,922
Commercial Business And Other [Member]
Loans:
Loans Receivable	$ 306,897	$ 295,076