Warranty - Analysis of Changes in the Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2017	Jan. 01, 2017
Disclosure Analysis Of Changes In Liability For Product Warranties [Abstract]
Balance at beginning of period	$ 47,113	$ 48,112	$ 46,116	$ 48,422
Current period provisions	6,204	4,085	13,012	14,932
Costs incurred	(3,843)	(4,250)	(10,880)	(12,492)
Foreign currency translation adjustment	23	(1,720)	1,249	(4,635)
Balance at end of period	$ 49,497	$ 46,227	$ 49,497	$ 46,227