Financial Statement Presentation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	$ (8,861,000)	$ (7,810,000)
Accounting Standards Update 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in income statement	0
Change in cash flow	0
Accounting Standards Update 2015-03 | Long-term Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	(8,900,000)
Accounting Standards Update 2015-03 | Other Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	$ 8,900,000
Minimum | New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment		45,000,000
Deferred tax liabilities, net		(45,000,000)
Maximum | New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment		50,000,000
Deferred tax liabilities, net		$ (50,000,000)