Mortgage-backed Securities: Schedule of available-for-sale mortgage-backed securities, Contractual Maturities (Details) (Collateralized Mortgage Backed Securities, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Collateralized Mortgage Backed Securities
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 55
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	58
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	39
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	41
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	7,134
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	7,184
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	10,704
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	10,423
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	17,932
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 17,706