Summary of Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 11,954	$ 10,120	$ 9,671
Charged to Costs and Expenses	7,439	5,735	5,890
Write-offs, Net of Recoveries	(6,059)	(3,901)	(5,441)
Balance at End of Period	13,334	11,954	10,120
Trade Receivables
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	5,161	4,327	4,338
Charged to Costs and Expenses	3,982	2,772	3,985
Write-offs, Net of Recoveries	(3,012)	(1,938)	(3,996)
Balance at End of Period	6,131	5,161	4,327
Other Receivables
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	6,549	5,555	5,103
Charged to Costs and Expenses	3,450	2,963	1,897
Write-offs, Net of Recoveries	(3,047)	(1,969)	(1,445)
Balance at End of Period	6,952	6,549	5,555
Other Non-Current Receivables
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	244	238	230
Charged to Costs and Expenses	7		8
Write-offs, Net of Recoveries		6
Balance at End of Period	$ 251	$ 244	$ 238