Restructuring - Additional Information (Details) $ in Thousands	3 Months Ended		8 Months Ended
	Mar. 31, 2018 USD ($) employee	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 1,789	$ 0
Restructuring 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges, pre tax	5,200		$ 29,000
Restructuring charges, net of tax	4,700		25,300
Restructuring reserve, settled without cash	2,408		12,500
Payments for restructuring	$ 4,410		16,500
Headcount reduction | employee	310
Restructuring and related charges	$ 5,244
Restructuring charges excluding other | Restructuring 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1,800
Minimum | Restructuring 2017
Restructuring Cost and Reserve [Line Items]
Expected restructuring cash charges	2,000		2,000
Maximum | Restructuring 2017
Restructuring Cost and Reserve [Line Items]
Expected restructuring cash charges	$ 5,000		$ 5,000