XML 45 R33.htm IDEA: XBRL DOCUMENT v3.20.2
Revenue from Contracts with Customers Revenue from Contract with Customers - Contract Asset Activity (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Contract Asset Balance [Roll Forward]        
Beginning Balance $ 86,198 $ 70,371 $ 84,663 $ 65,674
Contract payments 14,937 17,565 33,182 35,716
Contract amortization (17,456) (14,147) (34,166) (27,601)
Ending Balance $ 83,679 $ 73,789 $ 83,679 $ 73,789