Investments - Schedule of Fair Value Quantitative Information (Details) - Discounted Cash Flow - Limited Partnership - Level 3 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2017	Dec. 31, 2016
DCR Mortgage Fund VI, L.P.
Fair Value Inputs, Assets, Quantitative Information
Unrealized gains in accumulated other comprehensive income	$ (47)	$ (56)
Rate adjustment	2.35%	2.35%
RCH Mortgage Fund VI, L.P.
Fair Value Inputs, Assets, Quantitative Information
Unrealized gains in accumulated other comprehensive income	$ (341)	$ (341)
Rate adjustment	7.35%	7.35%

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- Definition

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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