Goodwill and Other Intangible Assets (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Goodwill and Other Intangible Assets
Indefinite-lived trade name intangible asset	$ 4,300		$ 4,300
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	270,900		270,900		272,000
Accumulated Amortization	121,600		121,600		107,100
Weighted average useful lives of amortizable intangible assets			10 years
Amortization expense	6,000	4,900	14,500	10,000
Amortization expense estimated for each of the next five fiscal years
2014	27,000		27,000
2015	24,500		24,500
2016	23,700		23,700
2017	23,500		23,500
2018	19,400		19,400
Customer relationships
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	201,200		201,200		202,300
Accumulated Amortization	80,200		80,200		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		52,300
Accumulated Amortization	24,400		24,400		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	11,400		11,400		11,400
Accumulated Amortization	$ 11,000		$ 11,000		$ 8,900
Weighted average useful lives of amortizable intangible assets			15 years