Revenue Recognition - Other Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues from contracts with customers	$ 1,636,773
Accounting Standards Update 2014-09 | Revenue gross-up
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues from contracts with customers	$ 448,846	$ 203,095	$ 314,270