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3. Loans, TDR Loan Modifications (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) Integer	Sep. 30, 2017 USD ($) Integer	Sep. 30, 2018 USD ($) Integer	Sep. 30, 2017 USD ($) Integer
Single-family residential TDR
TDR Loans
Number of Contracts | Integer	1	2	2	2
Pre-Modification Outstanding Recorded Investment	$ 61	$ 22	$ 94	$ 22
Post-Modification Outstanding Recorded Investment	$ 61	$ 22	$ 94	$ 22
Total real estate TDR loans
TDR Loans
Number of Contracts | Integer	1	2	2	2
Pre-Modification Outstanding Recorded Investment	$ 61	$ 22	$ 94	$ 22
Post-Modification Outstanding Recorded Investment	$ 61	$ 22	$ 94	$ 22
Total TDR Loans
TDR Loans
Number of Contracts | Integer	1	2	2	2
Pre-Modification Outstanding Recorded Investment	$ 61	$ 22	$ 94	$ 22
Post-Modification Outstanding Recorded Investment	$ 61	$ 22	$ 94	$ 22

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Number of financing receivables that have been modified by troubled debt restructurings.

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-Topic 310
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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

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