Employee Benefits - Defined Contribution (Details) - USD ($) $ in Thousands	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, maximum annual contribution per employee			$ 18	$ 18
Defined contribution plan, maximum annual contribution per employee, percentage			100.00%
Defined contribution plan, employer matching contribution, percentage			4.00%
Defined contribution plan, cost	$ 7,000
All Other Defined Contribution
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost	1,000
Cost of services and products
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost	1,000
Selling, general and administrative expense
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost	$ 5,000
Predecessor
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost		$ 30,000		37,000	$ 36,000
Predecessor | All Other Defined Contribution
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost		5,000		6,000	6,000
Predecessor | Cost of services and products
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost		4,000		5,000	5,000
Predecessor | Selling, general and administrative expense
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost		$ 26,000		$ 32,000	$ 31,000