Loan Receivable and Allowance for Loan and Lease Losses Impaired loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	$ 1,899		$ 1,631
Impaired Financing Receivable, Recorded Investment	17,362		22,501
Impaired Financing Receivable, Unpaid Principal Balance	17,917		23,327
Impaired Financing Receivable, Average Recorded Investment	17,034	27,906
Impaired Financing Receivable, Interest Income, Cash Basis Method	247	140
One- to four family loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	728		639
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	979		893
Impaired Financing Receivable, with Related Allowance, Recorded Investment	6,088		5,833
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	6,219		5,958
Impaired Financing Receivable, Related Allowance	1,085		520
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	729	1,740
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	7	1
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	6,089	5,100
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	31	37
Multifamily Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0		0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,436		2,240
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,436		2,240
Impaired Financing Receivable, Related Allowance	178		92
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	616
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,437	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	9	0
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,118		3,972
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,291		4,147
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,208		4,812
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,208		5,023
Impaired Financing Receivable, Related Allowance	21		255
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,124	8,781
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	61	54
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,215	4,531
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	20	5
Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0		0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	945
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	0	0
Business [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,009		341
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,009		402
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,770		4,664
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	3,770		4,664
Impaired Financing Receivable, Related Allowance	614		764
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,022	1,648
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	64	7
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,413	4,545
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	55	36
Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0		0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	$ 0	$ 0