Intangibles - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets, net	$ (275,565)		$ (305,079)
Intangible liabilities, net	$ (49,488)		$ (54,663)
Accounting Standards Update 2016-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets, net		$ 39,000
Intangible liabilities, net		$ 6,000