Acquisitions (Narrative) (Details) In Thousands, unless otherwise specified			0 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended		0 Months Ended				0 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 27, 2014 USD ($)	Dec. 31, 2013 USD ($)	Apr. 03, 2013 Marrazzi Group [Member] USD ($)	Mar. 19, 2013 Marrazzi Group [Member]	Sep. 28, 2013 Marrazzi Group [Member] USD ($)	Sep. 28, 2013 Marrazzi Group [Member] USD ($)	Dec. 31, 2013 Marrazzi Group [Member] USD ($)	Sep. 27, 2014 Marrazzi Group [Member] EUR (€)	Jan. 10, 2013 Pergo [Member] USD ($)	May 03, 2013 Spano Invest NV [Member] USD ($)	Sep. 27, 2014 3.85% Senior Notes Due February 1,2023 [Member]	Jan. 31, 2013 3.85% Senior Notes Due February 1,2023 [Member]	Apr. 03, 2013 Customer Relationships [Member] Marrazzi Group [Member] USD ($)	Apr. 03, 2013 Trademarks [Member] Marrazzi Group [Member] USD ($)	Jan. 10, 2013 Trademarks [Member] Pergo [Member] USD ($)	Sep. 27, 2014 Selling, General and Administrative Expenses [Member] USD ($)	Sep. 28, 2013 Selling, General and Administrative Expenses [Member] USD ($)	Sep. 27, 2014 Selling, General and Administrative Expenses [Member] USD ($)	Sep. 28, 2013 Selling, General and Administrative Expenses [Member] USD ($)	Sep. 28, 2013 Selling, General and Administrative Expenses [Member] Marrazzi Group [Member] USD ($)	Sep. 28, 2013 Selling, General and Administrative Expenses [Member] Marrazzi Group [Member] USD ($)	Dec. 31, 2013 Selling, General and Administrative Expenses [Member] Marrazzi Group [Member] USD ($)	Dec. 31, 2013 Other Expense [Member] Marrazzi Group [Member] USD ($)
Business Acquisition [Line Items]
Enterprise value			$ 1,522,731						$ 145,000	$ 160,000
Share price consideration period				30 days
Assumed indebtedness			901,773
Cash payments to acquire entity			307,052
Shares issued for acquisition, in shares			2,874
Shares issued for acquisition, value			313,906
Interest rate percentage											3.85%	3.85%
Acquisition related costs							15,660									0	402	0	14,214	402	14,214	14,199	1,461
Intangible assets subject to amortization									15,188				21,792
Intangible assets subject to amortization, useful life													10 years
Tradenames														215,357	16,834
Goodwill	1,668,520	1,736,092	276,586						18,456	37,739
Inventory step up, amortization					12,297	31,041
Accounts receivable, securitization facility								€ 3,713