Restructuring - Restructuring Activities (Details) - Restructuring 2017 - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	11 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2018
Restructuring Reserve [Roll Forward]
Restructuring reserve, start		$ 5,189
Restructuring and related cost, incurred cost	$ 2,913	8,157
Restructuring reserve, foreign currency translation gain (loss)		(18)
Payments for restructuring		6,481	$ 18,800
Restructuring reserve, settled without cash		2,980	99,500
Restructuring reserve, end	3,867	3,867	3,867
Severance and benefit related costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, start		3,864
Restructuring and related cost, incurred cost		2,268
Restructuring reserve, foreign currency translation gain (loss)		(9)
Payments for restructuring		2,993
Restructuring reserve, settled without cash		0
Restructuring reserve, end	3,130	3,130	3,130
Lease and contract termination costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, start		650
Restructuring and related cost, incurred cost		987
Restructuring reserve, foreign currency translation gain (loss)		(9)
Payments for restructuring		1,041
Restructuring reserve, settled without cash		0
Restructuring reserve, end	587	587	587
Relocation and other moving costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, start		0
Restructuring and related cost, incurred cost		74
Restructuring reserve, foreign currency translation gain (loss)		0
Payments for restructuring		74
Restructuring reserve, settled without cash		0
Restructuring reserve, end	0	0	0
Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, start		675
Restructuring and related cost, incurred cost		4,828
Restructuring reserve, foreign currency translation gain (loss)		0
Payments for restructuring		2,373
Restructuring reserve, settled without cash		2,980
Restructuring reserve, end	$ 150	$ 150	$ 150