Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2012

Goodwill and Other Intangible Assets

Summary of the Company's amortizable intangible assets

	September 30, 2012				December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	$	147,200	$	49,500	$	134,700	$	38,800
Proprietary technology	45,300		17,700		41,800		15,300
License agreements	6,000		5,100		6,000		4,600
Trade names and other	9,400		8,300		9,400		9,200
Total	$	207,900	$	80,600	$	191,900	$	67,900