Note 3 - Loans (Detail) - Net loan charge-offs (recoveries) by loan type: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net loan charge-offs	$ 20,240	$ 18,855	$ 13,625
Multi-Family Residential [Member]
Net loan charge-offs	5,872	6,654	5,773
Commercial Real Estate Loans [Member]
Net loan charge-offs	2,439	4,988	2,634
One-To-Four Family - Mixed-Use Property [Member]
Net loan charge-offs	3,928	2,521	2,465
One-To-Four Family - Residential [Member]
Net loan charge-offs	1,554	2,163	236
Co-Operative Apartments [Member]
Net loan charge-offs	62
Construction [Member]
Net loan charge-offs	4,591	1,088	1,879
Small Business Administration [Member]
Net loan charge-offs	237	811	752
Commercial Business And Other [Member]
Net loan charge-offs	$ 1,557	$ 630	$ (114)