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11. Fair Value Measurement: Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Total nonrecurring assets measured at fair value
    
Investments, Fair Value Disclosure $ 20,658 $ 6,647
Trust Preferred
    
Investments, Fair Value Disclosure 2,067 1,238
Agency Securities
    
Investments, Fair Value Disclosure 12,523 4,978
Real Estate Mortgage Investment Conduits
    
Investments, Fair Value Disclosure 216 237
FHLMC mortgage-backed securities
    
Investments, Fair Value Disclosure 2,041 191
FNMA mortgage-backed securities
    
Investments, Fair Value Disclosure 3,811 3
Fair Value, Inputs, Level 2 | Total nonrecurring assets measured at fair value
    
Investments, Fair Value Disclosure 18,591 5,409
Fair Value, Inputs, Level 2 | Agency Securities
    
Investments, Fair Value Disclosure 12,523 4,978
Fair Value, Inputs, Level 2 | Real Estate Mortgage Investment Conduits
    
Investments, Fair Value Disclosure 216 237
Fair Value, Inputs, Level 2 | FHLMC mortgage-backed securities
    
Investments, Fair Value Disclosure 2,041 191
Fair Value, Inputs, Level 2 | FNMA mortgage-backed securities
    
Investments, Fair Value Disclosure 3,811 3
Fair Value, Inputs, Level 3 | Total nonrecurring assets measured at fair value
    
Investments, Fair Value Disclosure 2,067 1,238
Fair Value, Inputs, Level 3 | Trust Preferred
    
Investments, Fair Value Disclosure $ 2,067 $ 1,238