Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Quarterly Financial Data [Abstract]
Net sales	$ 1,378,297	[1]	$ 1,442,512	$ 1,477,854	$ 1,343,595	$ 1,262,198	$ 1,309,552	$ 1,400,086	$ 1,347,236	$ 5,642,258	[2]	$ 5,319,072	[2]	$ 5,344,024	[2]
Gross profit	335,417	[1]	357,623	382,247	341,592	341,666	344,932	374,756	341,246	1,416,879		1,402,600		1,232,230
Net income (loss)	42,931	[1]	46,646	60,903	23,442	45,758	51,094	68,081	20,538	173,922		185,471		(5,499)
Basic earnings per share	$ 0.62	[1]	$ 0.68	$ 0.89	$ 0.34	$ 0.67	$ 0.74	$ 0.95	$ 0.30	$ 2.53		$ 2.66		$ (0.08)
Diluted earnings per share	$ 0.62	[1]	$ 0.68	$ 0.88	$ 0.34	$ 0.66	$ 0.74	$ 0.95	$ 0.30	$ 2.52		$ 2.65		$ (0.08)
Selling, general and administrative expense	$ 6,035

[1] During the fourth quarter of 2011, the Company corrected an immaterial error in its consolidated financial statements. The error related to accounting for operating leases. The correction of $6,035 resulted in an additional charge to selling, general and administrative expense in the Company's 2011 fourth quarter consolidated statement of operations. The Company believes the correction of this error to be both quantitatively and qualitatively immaterial to its quarterly results for 2011 or to any of its previously issued consolidated financial statements. The correction had no impact on the Company's cash flows as previously presented.

[2] The Soft surface product category includes carpets, rugs, carpet pad and resilient. The Tile product category includes ceramic tile, porcelain tile and natural stone. The Wood product category includes laminate, hardwood, roofing panels and wood-based panels.