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Loan Receivable and Allowance for Loan and Lease Losses Impaired loans (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Mar. 31, 2015
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | $ 188 |  | $ 556
Impaired Financing Receivable, Recorded Investment | 16,974 |  | 16,512
Impaired Financing Receivable, Unpaid Principal Balance | 18,817 |  | 17,195
Impaired Financing Receivable, Average Recorded Investment | 17,303 | $ 17,034 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 14 | 247 |
One- to four family loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 5,176 |  | 2,752
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 6,357 |  | 3,007
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,167 |  | 4,295
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 2,239 |  | 4,541
Impaired Financing Receivable, Related Allowance | 102 |  | 286
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 5,275 | 729 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 3 | 7 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 2,209 | 6,089 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 2 | 31 |
Multifamily Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,247 |  | 237
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 1,583 |  | 237
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 1,251
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 1,349
Impaired Financing Receivable, Related Allowance | 0 |  | 181
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 1,406 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 1,437 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 9 |
Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,866 |  | 1,880
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 2,036 |  | 1,880
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 736 |  | 741
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 736 |  | 741
Impaired Financing Receivable, Related Allowance | 83 |  | 76
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 1,869 | 2,124 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 61 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 739 | 2,215 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 20 |
Construction Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
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 |
Business [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 5,271 |  | 4,568
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 5,271 |  | 4,652
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 511 |  | 788
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 595 |  | 788
Impaired Financing Receivable, Related Allowance | 3 |  | 13
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 5,294 | 1,022 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 9 | 64 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 511 | 3,413 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 55 |
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 Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 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 | 0 | 5 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | $ 0 | $ 0 |

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