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
3 Months Ended
Jun. 30, 2018
USD ($)
Increase (Decrease) In Contract With Customer, Asset [Roll Forward]  
Balance as of April 1, 2018 $ 16,114
Additions 18,623
Billed amounts transferred to accounts receivable (14,209)
Total activity 4,414
Balance as of June 30, 2018 20,528
Increase (Decrease) In Contract With Customer, Liability [Roll Forward]  
Balance as of April 1, 2018 (8,143)
Additions (9,720)
Transfer to revenues as earned 11,786
Total activity 2,066
Balance as of June 30, 2018 $ (6,077)