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Commitments, Contingencies and Litigation - (Additional Information) (Details) € in Thousands, $ in Thousands			1 Months Ended			3 Months Ended						12 Months Ended
	Jun. 11, 2013 USD ($)	Jun. 11, 2013 EUR (€)	Jul. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Feb. 29, 2016 USD ($)	Dec. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 EUR (€)	Oct. 02, 2011 USD ($)	Oct. 02, 2011 EUR (€)	Mar. 31, 2018 USD ($)	Mar. 31, 2009 USD ($)	Mar. 31, 2009 EUR (€)
Commitments, Contingencies And Litigation [Line Items]
Reserves for anti-competition investigations						$ 0		$ 2,326				$ 2,326
Damages paid													$ 4,200	€ 2,700
Litigation expense refunded to company	$ 2,756	€ 2,000								$ 900	€ 671
Provision for environmental liabilities							$ 1,082					1,109
Belgium Anti-Competition Proceeding
Commitments, Contingencies And Litigation [Line Items]
Penalties paid relating to anti-competition investigations					$ 1,962	2,402
Reserves for anti-competition investigations						0		2,326				2,326
Germany Anti-Competition Proceeding
Commitments, Contingencies And Litigation [Line Items]
Penalties paid relating to anti-competition investigations				$ 14,811
Reserves for anti-competition investigations						0		0				0
Estimate of possible loss						11,415
Dutch Anti-Competition Proceeding
Commitments, Contingencies And Litigation [Line Items]
Penalties paid relating to anti-competition investigations			$ 11,229
Reserves for anti-competition investigations						$ 0		0				$ 0
Settled Litigation [Member]
Commitments, Contingencies And Litigation [Line Items]
Litigation expense refunded to company								$ 2,843	€ 2,500

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