Contract Assets and Liabilities - Contract Assets and Contract Liabilities from Contracts with Customers (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract assets, net	$ 13,625	$ 0
Contract assets, net - $ change	13,625
Contract liabilities, net	7,725	6,592
Contract liabilities, net - $ change	$ 1,133
Contract liabilities, net - % change	17.00%
Contract with customer, asset, after allowance for credit loss, current	$ 2,600
Contract liability amounts classified as current	2,900	$ 1,400
Increase in contract liability	$ 400