Revenue - Contract Assets and Liabilities From Contracts with Customers (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract liabilities	$ 1,137,123	$ 1,310,813
Accounts receivable, net
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Current contract assets	44,464	43,092
Prepaid expenses and other current assets
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Current contract assets	5,830	4,593
Other assets
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Noncurrent other assets	22,457	20,496
Other current liabilities
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract liabilities	$ 2,536	$ 5,171