Goodwill and Other Intangible Assets (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Goodwill and Other Intangible Assets
Indefinite-lived trade name intangible asset	$ 4,300
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	270,900		272,000
Accumulated Amortization	115,400		107,100
Weighted average useful lives of amortizable intangible assets	10 years
Amortization expense	8,300	5,000
Amortization expense estimated for each of the next five fiscal years
2014	27,000
2015	24,500
2016	23,700
2017	23,500
2018	19,400
Customer relationships
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	201,200		202,300
Accumulated Amortization	75,100		69,800
Weighted average useful lives of amortizable intangible assets	9 years
Proprietary technology
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	52,300		52,300
Accumulated Amortization	23,400		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
Accumulated Amortization	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	11,400		11,400
Accumulated Amortization	$ 10,900		$ 8,900
Weighted average useful lives of amortizable intangible assets	15 years