Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Contract assets, noncurrent	$ 105,461	$ 60,075
Contract assets	6,000	4,000
Prepaid expenses and other current assets
Revenue from External Customer [Line Items]
Contract assets, current	105,499	79,268
Accounts receivable, net
Revenue from External Customer [Line Items]
Contract assets, current	539,806	501,467
Other assets, net
Revenue from External Customer [Line Items]
Contract assets, noncurrent	38,250	50,467
Other noncurrent liabilities
Revenue from External Customer [Line Items]
Contract liabilities	$ 167,832	$ 165,858