Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2012

Intangible Assets [Abstract]

Schedule Of Intangible Assets Subject To Amortization

	June 30, 2012							December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Net		Weighted Average Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Net	Weighted Average Useful Life (in years)
Customer lists	$	81,940	$	(23,649)	$	58,291	9.4	$	71,783	$	(17,809)	53,974	9.6
Intellectual property		37,569		(14,076)		23,493	4.0		26,134		(9,316)	16,818	2.2
Non-compete		1,000		(686)		314	0.5		2,007		(1,546)	461	0.7
Trademarks		2,234		(600)		1,634	5.1		2,232		(411)	1,821	5.6
Fully amortized intangibles		5,406		(5,406)		—	—		4,199		(4,199)	—	—
Total	$	128,149	$	(44,417)	$	83,732	7.6	$	106,355	$	(33,281)	73,074	7.4

Schedule Of Estimated Amortization Expense For Intangible Assets Next Five Years

Period		Amortization Expense
Remainder of 2012	$	11,293
2013		17,185
2014		10,708
2015		8,372
2016		7,255
Thereafter		28,919
Total	$	83,732