Schedule II (Details) - Valuation and Qualifying Accounts and Reserves (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2014		Dec. 28, 2013		Dec. 29, 2012
Allowance for Doubtful Accounts [Member]
Valuation Allowance [Line Items]
Balance at beginning of year	$ 790		$ 705		$ 394
Charge to cost and expenses	130	[1]	2,289	[1]	242	[1]
Deductions	656	[2]	2,316	[2]	51	[2]
Charge to other accounts	14	[3]	112	[3]	120	[3]
Balance at end of year	278		790		705
Reserve for Cash Discount [Member]
Valuation Allowance [Line Items]
Balance at beginning of year	16,117		12,803		11,912
Charge to cost and expenses	85,825	[1]	77,659	[1]	68,004	[1]
Deductions	82,568	[2]	74,432	[2]	67,055	[2]
Charge to other accounts	(234)	[3]	87	[3]	(58)	[3]
Balance at end of year	19,140		16,117		12,803
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Balance at beginning of year	6,250		784		708
Charge to cost and expenses		[1]	6,085	[1]	76	[1]
Deductions	1,693	[2]	619	[2]		[2]
Charge to other accounts		[3]		[3]		[3]
Balance at end of year	$ 4,557		$ 6,250		$ 784

[1] Includes provision for doubtful accounts, sales returns and sales discounts granted to customers.

[2] Represents uncollectible accounts written off, net of recoveries and credits issued to customers and the write-off of certain deferred tax assets thatpreviously had full valuation allowances.

[3] Represents business acquisitions and foreign currency translation adjustments.