Loan and Lease Losses Non-performing loans (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	$ 30,626	$ 54,588
One- to four family loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	7,642	6,988
Multifamily Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	423	2,923
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	14,788	24,467
Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	1,230	11,325
Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	6,505	8,862
Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	$ 38	$ 23