Summary of Significant Accounting Policies - Principles of Consolidation and Investment in Unconsolidated Entities (Details) - Unconsolidated Entities [Member]	12 Months Ended
	Dec. 31, 2015 subsidiary
Schedule of Equity Method Investments [Line Items]
Recovery term in excess of which declines in value are considered other than temporary	12 months
Equity Method Investment, Ownership Percentage	50.00%
Number of subsidiaries considered variable interest entities	0
Equity method investment, ownership percentage threshold	50.00%
Term basis for investment in unconsolidated entities depreciation	40 years