Goodwill and Intangibles (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Goodwill and Intangibles

Schedule of intangible assets

Intangible assets at March 31, 2013 consisted of the following:

	Estimated useful life	Weighted average remaining life	Gross cost		Accumulated amortization		Net
Customer relationships	Up to 10 years	3.7	$	110,823	$	66,019	$	44,804
Technology-based intangible assets	3 to 5 years	2.8	5,341		1,928		3,413
Non-compete agreements	2 years	1.9	2,767		115		2,652
Trade names	4 years	2.7	704		15		689
Trade names - indefinite	Indefinite	Indefinite	16,100		—		16,100
			$	135,735	$	68,077	$	67,658

Intangible assets at December 31, 2012 consisted of the following:

	Estimated useful life	Weighted average remaining life		Gross cost		Accumulated amortization		Net
Customer relationships	Up to 10 years		2.6	$	98,749	$	63,055	$	35,694
Technology-based intangible assets	5 years		1.0		2,198		1,652		546
Trade names	Indefinite		Indefinite		16,100		—		16,100
				$	117,047	$	64,707	$	52,340

Schedule of future amortization expense of intangible assets for the next five years

	Remainder of 2013		2014		2015		2016		2017		2018		Thereafter
Amortization	$	11,812	$	11,875	$	8,803	$	6,503	$	5,176	$	4,335	$	3,054

	2013		2014		2015		2016		2017		Thereafter
Amortization	$	11,497	$	7,571	$	5,652	$	4,435	$	3,425	$	3,660