Quarterly report pursuant to Section 13 or 15(d)

Revenue from Contracts with Customers Revenue from Contracts with Customers - Contract Assets and Contract Liabilities (Details)

v3.10.0.1
Revenue from Contracts with Customers Revenue from Contracts with Customers - Contract Assets and Contract Liabilities (Details)
$ in Thousands
6 Months Ended
Sep. 30, 2018
USD ($)
Increase (Decrease) In Contract With Customer, Asset [Roll Forward]  
Additions $ 45,364
Billed amounts transferred to accounts receivable (39,576)
Total activity 5,788
Increase (Decrease) In Contract With Customer, Liability [Roll Forward]  
Balance as of April 1, 2018 (8,143)
Additions (17,500)
Transfer to revenues as earned 17,696
Total activity 196
Balance as of September 30, 2018 $ (7,947)