Segment Information (Reconciliation of Consolidated Adjusted EBITDA to Net Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jun. 14, 2021	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Segment Reporting [Abstract]
Net income attributable to Masonite		$ 57,037	$ 37,691	$ 183,134	$ 119,718
Depreciation		17,461	17,365	51,977	52,876
Amortization		4,256	5,423	13,164	16,749
Share based compensation expense		5,556	2,336	16,251	11,460
Loss (gain) on disposal of property, plant and equipment		155	2,164	(1,245)	1,954
Restructuring (benefit) costs		(141)	1,311	(221)	5,146
Asset impairment		0	0	0	10,374
Loss on disposal of subsidiaries	$ 8,600	0	0	0	8,590
Interest expense, net		10,266	11,349	31,098	35,213
Other (income) expense, net		211	(1,471)	(1,604)	(4,400)
Loss on extinguishment of debt		0	(13,583)	0	(13,583)
Income tax expense		16,376	13,854	59,502	42,713
Net income attributable to non-controlling interest		745	1,156	2,743	3,374
Adjusted EBITDA		$ 111,922	$ 104,761	$ 354,799	$ 317,350