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3. Loans, TDR Loan Modifications (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Integer	Dec. 31, 2016 USD ($) Integer
TDR Loans
Post-Modification Outstanding Recorded Investment	$ 4,900	$ 5,900
Single-family residential
TDR Loans
Number of Contracts | Integer	2	3
Pre-Modification Outstanding Recorded Investment	$ 22	$ 124
Post-Modification Outstanding Recorded Investment	$ 22	$ 121
Total TDR Loans
TDR Loans
Number of Contracts | Integer	2	3
Pre-Modification Outstanding Recorded Investment	$ 22	$ 124
Post-Modification Outstanding Recorded Investment	$ 22	$ 121

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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