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6. Mortgage-backed Securities: Schedule of Mortgage Backed Securities Held to Maturity Table (Details) (USD $)
Jun. 30, 2013
Mar. 31, 2013
Mortgage-Backed Securities Held to Maturity
   
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment $ 122 $ 125
Held to Maturity Securities Unrecognized Holding Gain 3 4
Held-to-maturity Securities, Fair Value 125 129
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC)
   
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment 30 31
Held to Maturity Securities Unrecognized Holding Gain 2 3
Held-to-maturity Securities, Fair Value 32 34
Federal National Mortgage Association Certificates and Obligations (FNMA)
   
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment 92 94
Held to Maturity Securities Unrecognized Holding Gain 1 1
Held-to-maturity Securities, Fair Value $ 93 $ 95