Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2012

Intangible Assets [Abstract]

Company's purchased intangible assets

	Gross Intangibles		Accumulated Amortization			Net Intangibles		Weighted Average Amortization Period (years)
Customer relationships	$	58,465	$	(15,990	)	$	42,475		8
Trade name		1,000		(639	)		361		3
Non-compete agreements		560		(560	)		—		1
Proprietary software		850		(743	)		107		2
	$	60,875	$	(17,932	)	$	42,943		8

	Gross Intangibles		Accumulated Amortization			Net Intangibles		Weighted Average Amortization Period (years)
Customer relationships	$	58,027	$	(14,056	)	$	43,971		8
Trade name		1,000		(639	)		361		3
Non-compete agreements		560		(560	)		—		1
Proprietary software		850		(710	)		140		2
	$	60,437	$	(15,965	)	$	44,472		8

Amortization expense related to the purchased intangible assets

	Three Months Ended March 31,
	2012		2011
Amortization expense	$	1,861	$	2,047

Estimated future amortization expense

Years Ending December 31,	Amount
2012 (remaining nine months)	$	5,877
2013		7,340
2014		7,278
2015		7,275
2016		7,275
2017		7,275
2018 and thereafter		623