Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to Masonite	$ 20,826	$ 23,565
Less: income (loss) from discontinued operations, net of tax	(250)	(245)
Income (loss) from continuing operations attributable to Masonite	$ 21,076	$ 23,810
Shares used in computing basic earnings per share	28,189,790	29,861,099
Effect of dilutive securities:
Incremental shares issuable under share compensation plans and warrants	482,472	593,889
Shares used in computing diluted earnings per share	28,672,262	30,454,988
Basic earnings (loss) per common share attributable to Masonite:
Continuing operations attributable to Masonite	$ 0.75	$ 0.80
Discontinued operations attributable to Masonite, net of tax	(0.01)	(0.01)
Total Basic earnings per common share attributable to Masonite	0.74	0.79
Continuing operations attributable to Masonite	0.74	0.78
Discontinued operations attributable to Masonite, net of tax	(0.01)	(0.01)
Total Diluted earnings per common share attributable to Masonite	$ 0.73	$ 0.77
Anti-dilutive instruments excluded from diluted earnings per common share	51,129	0