Income Taxes - Income (loss) before provision for tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Financial Designation, Predecessor and Successor [Fixed List]	Successor	Successor	Successor	Predecessor	Successor	Successor	Predecessor
Total income before provision for income taxes		$ 32,722		$ 142,060	$ 225,326		$ 89,777
United States
Income Tax Disclosure [Line Items]
Total income before provision for income taxes					207,700
Foreign
Income Tax Disclosure [Line Items]
Total income before provision for income taxes					$ 17,600