Organization and Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Organization and Summary of Significant Accounting Policies [Abstract]
Number of sales centers in North America and Europe	312
Number of distribution networks	3
Shipping and handling costs associated with outbound freight	$ 33,964,000	$ 33,588,000	$ 29,924,000
Advertising expense	6,248,000	5,484,000	5,534,000
(Gains) losses on foreign currency transactions	(111,000)	592,000	(1,498,000)
Threshold past due account balances for reserve analysis	20,000
Threshold past due days for reserve analysis	60
Sales period (in months) for establishing reserve for inventory obsolescence	12
Sales period (in months) for establishing reserve for inventory obsolescence - Tile	36
Depreciation expense	11,592,000	9,746,000	8,980,000
Measurement period for acquisition, maximum (in years)	1
Cash paid during the year for [Abstract]
Interest	5,495,000	7,104,000	7,690,000
Income taxes, net of refunds	$ 45,404,000	$ 39,771,000	$ 25,965,000