Supplemental Unaudited Quarterly FInancial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 531,237	$ 552,192	$ 562,943	$ 530,311	$ 528,350	$ 557,148	$ 566,726	$ 517,879	$ 2,176,683	$ 2,170,103	$ 2,032,925
Cost of goods sold	420,192	426,588	434,013	418,207	432,989	446,306	443,052	412,450	1,699,000	1,734,797	1,625,942
Gross profit	111,045	125,604	128,930	112,104	95,361	110,842	123,674	105,429	477,683	435,306	406,983
Selling, general and administration expenses	76,752	77,573	78,142	78,100	61,601	64,530	71,851	68,211	310,567	266,193	247,917
Restructuring costs	2,681	1,994	1,361	3,740	1,624	0	0	0	9,776	1,624	850
Asset impairment	0	0	3,142	10,625	5,243	0	0	0	13,767	5,243	0
Loss on disposal of subsidiaries	9,655	0	0	4,605					14,260	0	212
Operating income	21,957	46,037	46,285	15,034	26,893	46,312	51,823	37,218	129,313	162,246	158,004
Interest expense, net	12,096	11,909	11,357	11,127	11,027	10,151	9,074	8,756	46,489	39,008	30,153
Loss on extinguishment of debt	0	(14,523)	0	0	0	5,414	0	0	14,523	5,414	0
Other expense (income), net	(4,363)	824	456	1,130	724	948	839	22	(1,953)	2,533	1,570
Income before income tax expense	5,498	20,429	35,384	5,037	16,590	31,695	43,588	28,484	66,348	120,357	129,421
Income tax expense (benefit)	2,624	4,334	10,293	58	3,067	6,151	7,894	6,701	17,309	23,813	(27,560)
Net income	2,874	16,095	25,091	4,979	13,523	25,544	35,694	21,783	49,039	96,544	156,981
Less: net income attributable to non-controlling interests	1,272	1,126	849	1,190	1,176	748	953	957	4,437	3,834	5,242
Net income attributable to Masonite	$ 1,602	$ 14,969	$ 24,242	$ 3,789	$ 12,347	$ 24,796	$ 34,741	$ 20,826	$ 44,602	$ 92,710	$ 151,739
Earnings Per Share, Basic and Diluted [Abstract]
Basic earnings per common share attributable to Masonite (in dollars per share)	$ 0.06	$ 0.60	$ 0.96	$ 0.15	$ 0.47	$ 0.90	$ 1.26	$ 0.74	$ 1.77	$ 3.38	$ 5.18
Diluted earnings per common share attributable to Masonite (in dollars per share)	$ 0.06	$ 0.59	$ 0.96	$ 0.15	$ 0.46	$ 0.89	$ 1.24	$ 0.73	$ 1.75	$ 3.33	$ 5.09