Investments - Schedule of Fair Value Quantitative Information (Details) - Discounted Cash Flow - Limited Partnership - Level 3 - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2015	Dec. 31, 2014
DCR Mortgage Fund VI, L.P.
Fair Value Inputs, Assets, Quantitative Information
Unrealized gains in accumulated other comprehensive income	$ (105)	$ (107)
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	$ (292)	$ (292)
Rate adjustment	6.10%	6.10%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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

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-URI http://asc.fasb.org/extlink&oid=36462937&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

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-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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