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Fair Value Measurements: Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Mar. 31, 2016
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Total assets measured at fair value on a nonrecurring basis | $ 152,251 | $ 150,690
Trust preferred |  |
Total assets measured at fair value on a nonrecurring basis | 1,786 | 1,808
Agency securities |  |
Total assets measured at fair value on a nonrecurring basis | 14,051 | 19,569
Real estate mortgage investment conduits |  |
Total assets measured at fair value on a nonrecurring basis | 42,661 | 43,924
Mortgage-backed |  |
Total assets measured at fair value on a nonrecurring basis | 76,822 | 76,353
Other mortgage-backed securities |  |
Total assets measured at fair value on a nonrecurring basis | 16,931 | 9,036
Fair Value, Inputs, Level 2 |  |
Total assets measured at fair value on a nonrecurring basis | 150,465 | 148,882
Fair Value, Inputs, Level 2 | Agency securities |  |
Total assets measured at fair value on a nonrecurring basis | 14,051 | 19,569
Fair Value, Inputs, Level 2 | Real estate mortgage investment conduits |  |
Total assets measured at fair value on a nonrecurring basis | 42,661 | 43,924
Fair Value, Inputs, Level 2 | Mortgage-backed |  |
Total assets measured at fair value on a nonrecurring basis | 76,822 | 76,353
Fair Value, Inputs, Level 2 | Other mortgage-backed securities |  |
Total assets measured at fair value on a nonrecurring basis | 16,931 | 9,036
Fair Value, Inputs, Level 3 |  |
Total assets measured at fair value on a nonrecurring basis | 1,786 | 1,808
Fair Value, Inputs, Level 3 | Trust preferred |  |
Total assets measured at fair value on a nonrecurring basis | $ 1,786 | $ 1,808

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