Annual report pursuant to Section 13 and 15(d)

Revenue - Capitalized Mobilization Costs and Amortization Costs (Details)

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Revenue - Capitalized Mobilization Costs and Amortization Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]      
Capitalized mobilization costs   $ 5,376 $ 5,343
Amortization of capitalized mobilization costs $ 3,066 $ 1,541 $ 6,648