Goodwill and Other Intangible Assets (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Goodwill and Other Intangible Assets
Indefinite-lived trade name intangible asset	$ 49,300		$ 49,300
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	351,400		351,400		272,000
Accumulated Amortization	127,800		127,800		107,100
Weighted average useful lives of amortizable intangible assets			10 years
Amortization expense	6,200	5,000	20,700	15,000
Amortization expense estimated for each of the next five fiscal years
2014	35,500		35,500
2015	30,700		30,700
2016	29,800		29,800
2017	29,600		29,600
2018	25,500		25,500
Customer relationships
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	273,500		273,500		202,300
Accumulated Amortization	85,300		85,300		69,800
Weighted average useful lives of amortizable intangible assets			10 years
Proprietary technology
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	53,600		53,600		52,300
Accumulated Amortization	25,400		25,400		22,400
Weighted average useful lives of amortizable intangible assets			14 years
License agreements
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	6,000		6,000		6,000
Accumulated Amortization	6,000		6,000		6,000
Weighted average useful lives of amortizable intangible assets			8 years
Trade names and other
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	18,300		18,300		11,400
Accumulated Amortization	$ 11,100		$ 11,100		$ 8,900
Weighted average useful lives of amortizable intangible assets			15 years