Unconsolidated Subsidiaries (Narrative) (Details)	9 Months Ended
	Sep. 30, 2016 USD ($) subsidiary	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)
Variable Interest Entity [Line Items]
Number of wholly owned subsidiaries | subsidiary	2
Variable interest entity, reporting entity involvement, maximum risk of loss	$ 5,300,000	$ 4,000,000.0	$ 3,900,000
Loans receivable
Variable Interest Entity [Line Items]
Variable interest entity, reporting entity involvement, maximum risk of loss	2,500,000.0
Other noncurrent assets
Variable Interest Entity [Line Items]
Investment in unconsolidated operations and related tax position	$ 34,000,000	$ 24,600,000	$ 25,900,000