Accumulated Other Comprehensive Income and Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Accumulated Foreign Exchange Gains (Losses) [Roll Forward]
Accumulated foreign exchange losses, beginning of period	$ (129,930)	$ (89,824)	$ (127,433)
Foreign exchange gain (loss)	14,544	(40,880)	38,758
Income tax benefit (expense) on foreign exchange losses	25	(60)	(609)
Cumulative translation adjustment recognized upon deconsolidation of subsidiaries	2,368	0	212
Less: foreign exchange gain (loss) attributable to non-controlling interest	343	(834)	752
Accumulated foreign exchange losses, end of period	(113,336)	(129,930)	(89,824)
Accumulated Amortization of Actuarial Net Losses [Roll Forward]
Accumulated pension and other post-retirement adjustments	(22,989)	(20,328)	(21,553)
Pension and other post-retirement adjustments	(962)	4,754	(529)
Income tax (expense) benefit on pension and other post-retirement adjustments	(347)	1,113	39
Amortization of actuarial net losses	1,798	1,291	1,113
Income tax expense on amortization of actuarial net losses	(442)	(311)	(456)
Pension settlement charges	5,651	0	0
Income tax expense on pension settlement charges	(1,466)	0	0
Accumulated pension and other post-retirement adjustments	(16,833)	(22,989)	(20,328)
Accumulated other comprehensive loss	(130,169)	(152,919)	(110,152)
Other comprehensive income (loss), net of tax:	23,093	(43,601)	39,586
Less: other comprehensive income (loss) attributable to non-controlling interest	343	(834)	752
Other comprehensive income (loss) attributable to Masonite	$ 22,750	$ (42,767)	$ 38,834