Commitments and Contingencies (Details) $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) employee	Dec. 31, 2017 USD ($) item
Total future minimum lease payments
2018		$ 2.5
2019		2.4
2020		2.2
2021		1.1
2022		0.7
Thereafter		3.7
Total future minimum lease payments		$ 12.6
Purchase Obligations for Rigs
Number of high-spec well service rigs acquired | item		30
Number of additional high-spec well service rigs to be acquired | item		9
Aggregate purchase price of rigs		$ 42.1
Payments made		4.5
Purchase obligation due in 2018		37.6
Amount included in accounts payable		23.5
Employee Severance
Liability related to severance payments		$ 1.0
Officer
Employee Severance
Number of employees terminated | employee	1
Severance payments	$ 0.7
Minimum
Operating Leases
Renewal term		1 year
Maximum
Operating Leases
Renewal term		5 years