Organization and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Organization and Summary of Significant Accounting Policies [Abstract]
Number of sales centers in North America, Europe, South America and Australia	344
Number of distribution networks	4
Shipping and handling costs associated with outbound freight	$ 39,879,000	$ 36,783,000	$ 38,674,000
Advertising expense	7,011,000	7,127,000	6,894,000
Gains (losses) on foreign currency transactions	(679,000)	(774,000)	(277,000)
Threshold past due account balances for reserve analysis	$ 20,000
Threshold past due days for reserve analysis	60 days
Sales period (in months) for establishing reserve for inventory obsolescence	12 months
Sales period (in months) for establishing reserve for inventory obsolescence - Tile	36 months
Sales period (in months) for establishing reserve for inventory obsolescence - Parts	48 months
Depreciation expense	$ 20,338,000	16,373,000	14,495,000
Cumulative Share Repurchases	1,093,291,000
Cumulative Dividends	$ 367,748,000
Controlling interest by parent	60.00%
Cash paid during the year for [Abstract]
Interest	$ 8,052,000	6,316,000	6,481,000
Income taxes, net of refunds	$ 80,378,000	$ 65,668,000	$ 58,405,000