Other Comprehensive Income and Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Dec. 31, 2017
Accumulated Foreign Currency Translation Gains (Losses) [Roll Forward]
Accumulated foreign currency translation gains (losses), beginning of period	$ (89,824)	$ (127,433)	$ (127,433)
Foreign currency translation gain (loss)	5,774	5,730
Income tax benefit (expense) on foreign currency translation gain (loss)	(22)	(643)
Less: foreign currency translation gain (loss) attributable to non-controlling interest	(243)	104
Accumulated foreign currency translation gains (losses), end of period	(83,829)	(122,450)	(89,824)
Accumulated Amortization of Actuarial Net Losses [Roll Forward]
Accumulated pension and other post-retirement adjustments, beginning of period	(20,328)	(21,553)	(21,553)
Amortization of actuarial net losses	300	292
Income tax benefit (expense) on amortization of actuarial net losses	(78)	(114)
Accumulated pension and other post-retirement adjustments	(20,106)	(21,375)	(20,328)
Accumulated other comprehensive income (loss)	(103,935)	(143,825)	(110,152)
Other comprehensive income (loss), net of tax	5,974	5,265	$ 39,586
Less: other comprehensive income (loss) attributable to non-controlling interest	(243)	104
Other comprehensive income (loss) attributable to Masonite	$ 6,217	$ 5,161