Summary of Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 16,350	$ 13,880	$ 13,334
Charged to Costs and Expenses	9,415	9,831	7,415
Write-offs, Net of Recoveries	(8,432)	(7,361)	(6,869)
Balance at End of Period	17,333	16,350	13,880
Trade Receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	7,284	6,413	6,131
Charged to Costs and Expenses	6,121	4,309	3,886
Write-offs, Net of Recoveries	(4,735)	(3,438)	(3,604)
Balance at End of Period	8,670	7,284	6,413
Other Receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	8,806	7,211	6,952
Charged to Costs and Expenses	3,291	5,518	3,520
Write-offs, Net of Recoveries	(3,698)	(3,923)	(3,261)
Balance at End of Period	8,399	8,806	7,211
Other Non-Current Receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	260	256	251
Charged to Costs and Expenses	3	4	9
Write-offs, Net of Recoveries	1		(4)
Balance at End of Period	$ 264	$ 260	$ 256