Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Revenue from Contracts with Customer [Line Items]
Accounts receivable, net	[1]	$ 188,876	$ 160,239
Customers [Member]
Revenue from Contracts with Customer [Line Items]
Accounts receivable, net		$ 252,300	$ 244,400

[1] Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $56.1 million and $36.1 million as of March 31, 2018, and December 31, 2017, respectively.