Organization and Significant Accounting Policies - Intangible Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015
Intangible Assets
Impairment to goodwill or other recorded intangible assets	$ 0.0
Customer relationships | Minimum
Intangible Assets and Liabilities
Useful life of intangible assets		9 years
Customer relationships | Maximum
Intangible Assets and Liabilities
Useful life of intangible assets		17 years
Leasehold interests | Minimum
Intangible Assets and Liabilities
Useful life of intangible assets		2 years
Leasehold interests | Maximum
Intangible Assets and Liabilities
Useful life of intangible assets		10 years