Goodwill - Summary of Recognition of the Goodwill Impairment Charges (Detail) - USD ($)
$ in Thousands
Mar. 28, 2015
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Goodwill:        
East region $ 415,582 $ 419,270 $ 127,038 $ 179,120
Utah Operations in the West Region [Member]        
Goodwill:        
East region     $ 36,589