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Mortgage-backed Securities: Schedule of Temporarily Impaired Mortgage-backed securities, Fair Value and Unrealized Losses (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Mar. 31, 2014
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Real estate mortgage investment conduits |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 18,852 |  | $ 4,996
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | (82) |  | (77)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 18,852 |  | 4,996
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | (82) |  | (77)
Mortgage-backed |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 31,596 | [1] | 49,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | (110) | [1] | (547)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 5,221 | [1] |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | (212) | [1] |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 36,817 | [1] | 49,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | (322) | [1] | (547)
Other mortgage-backed securities |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 757 | [2] | 1,526
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | (7) | [2] | (13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 708 | [2] |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | (6) | [2] |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 1,465 | [2] | 1,526
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | (13) | [2] | (13)
Total Real Estate mortgage investment conduits and mortgage-backed securities |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 51,205 |  | 55,699
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | (199) |  | (637)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 5,929 |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | (218) |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 57,134 |  | 55,699
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | $ (417) |  | $ (637)
[1] | Comprised of FHLMC and FNMA issued securities.
[2] | Comprised of SBA issued securities.

X
- Definition Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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