Note 3 - Loans and Allowance for Loan Losses (Details) - Non-performing Loans - Nonperforming Financial Instruments [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	$ 3,260	$ 2,301
Non-accrual mortgage loans:
Non-accrual loans	22,817	31,890
Total non-accrual loans and ninety days or more past due and still accruing	26,077	34,191
Mortgage Receivable [Member]
Non-accrual mortgage loans:
Non-accrual loans	22,031	30,747
Non-mortgage Receivables [Member]
Non-accrual mortgage loans:
Non-accrual loans	786	1,143
Multi-family Residential Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	233	676
Multi-family Residential Portfolio Segment [Member] \| Mortgage Receivable [Member]
Non-accrual mortgage loans:
Non-accrual loans	3,561	6,878
Commercial Real Estate Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	1,183	820
Commercial Real Estate Portfolio Segment [Member] \| Mortgage Receivable [Member]
Non-accrual mortgage loans:
Non-accrual loans	2,398	5,689
One-to-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	611	405
One-to-Four Family - Mixed-Use Property Portfolio Segment [Member] \| Mortgage Receivable [Member]
Non-accrual mortgage loans:
Non-accrual loans	5,952	6,936
One-to-Four Family Residential Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	13	14
One-to-Four Family Residential Portfolio Segment [Member] \| Mortgage Receivable [Member]
Non-accrual mortgage loans:
Non-accrual loans	10,120	11,244
Construction Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	1,000
Commercial Business and Other Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	220	386
Commercial Business and Other Portfolio Segment [Member] \| Non-mortgage Receivables [Member]
Non-accrual mortgage loans:
Non-accrual loans	568	$ 1,143
Small Business Administration Portfolio Segment [Member] \| Non-mortgage Receivables [Member]
Non-accrual mortgage loans:
Non-accrual loans	$ 218

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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