Supplemental Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Undistributed Earnings of Foreign Subsidiaries	$ 14,889
Accrued Liabilities
Accrued liabilities	155,245	181,460
Accrued rebates	26,399	28,312
Accrued Incentive Compensation, Current	32,374	16,371
Other Income, Net
Management services	433	400	400
Interest income	3,086	4,010	2,865
Franchise taxes	(888)	(664)	(893)
Income from equity method investees	4,914	1,444	2,890
Other	(755)	(1,670)	366
Other income, net	6,790	3,520	5,628
Cash Flow Information
Interest paid, net of interest capitalized	16,426	42,266	48,431
Income taxes paid	251,599	179,882	126,283
Fair value of assets acquired	188,930
Cash paid for purchase	(178,309)	0	0
Liabilities assumed	$ 10,621