Nature of Business and Accounting Policies - Intra-Equity Transfers (Details) - USD ($)	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018	Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets	$ 1,626,358,000		$ 1,880,125,000
Cumulative effect adjustment for adoption of new accounting guidance		$ (40,310,000)		$ 9,229,000	$ 0
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets				204,700,000
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment for adoption of new accounting guidance		$ (40,310,000)		33,349,000	$ (9,371,000)
Accumulated Deficit | Accounting standards update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment for adoption of new accounting guidance				$ 0