Restructuring Plans - Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Charges (reversals) to expense	$ 2,054	$ 0
United Kingdom and Australia Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of March 31, 2019	39
Charges (reversals) to expense	(22)
Cash paid	(6)
Restructuring reserve as of June 30, 2019	11
United Kingdom and Australia Restructuring Plan | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of March 31, 2019	1
Charges (reversals) to expense	(1)
Cash paid	0
Restructuring reserve as of June 30, 2019	0
United Kingdom and Australia Restructuring Plan | Facility Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of March 31, 2019	24
Charges (reversals) to expense	(24)
Cash paid	0
Restructuring reserve as of June 30, 2019	0
United Kingdom and Australia Restructuring Plan | Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of March 31, 2019	14
Charges (reversals) to expense	3
Cash paid	(6)
Restructuring reserve as of June 30, 2019	11
Strategic Business Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of June 30, 2019	422
Strategic Business Initiative | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of March 31, 2019	634
Cash paid	(212)
Restructuring reserve as of June 30, 2019	422
Performance Improvement Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of June 30, 2019	1,586
Performance Improvement Initiative | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve as of March 31, 2019	2,076
Cash paid	(490)
Restructuring reserve as of June 30, 2019	$ 1,586