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Mortgage-backed Securities: Schedule of available-for-sale mortgage-backed securities, Contractual Maturities (Details) (Collateralized Mortgage Backed Securities, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Collateralized Mortgage Backed Securities
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 89
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	90
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	253
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	268
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	187
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	191
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	529
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 549

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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