Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Schedule of assets under capital lease, included in equipment and fixtures, net, on consolidated balance sheets

	December 31, 2012			December 31, 2011
Furniture and fixtures	$	2,940		$	2,968
Building improvements		12,797			12,884
Computer equipment		15,718			10,262
Telecom and other equipment		18,919			17,778
		50,374			43,892
Less: accumulated depreciation		(28,338	)		(17,917	)
	$	22,036		$	25,975

Schedule of future minimum payments under capital and operating leases

Future minimum payments under capital and operating leases consist of the following at December 31, 2012:

	Capital Leases			Operating Leases
2013		10,159			37,823
2014		4,798			30,105
2015		1,069			25,162
2016		575			18,379
2017		—			9,313
Thereafter		—			7,703
Total future minimum lease payments		16,601		$	128,485
Less amount representing interest		(1,355	)
		15,246
Less current portion		(9,279	)
Capital lease obligations, net of current portion	$	5,967

Schedule of rent expense included in consolidated statements of operations in selling, general and administrative expenses

	Year Ended December 31,
	2012			2011			2010
Rent expense	$	48,761		$	49,265		$	50,176
Market lease reserve amortization		(760	)		(3,455	)		(4,830	)
Net rent expense	$	48,001		$	45,810		$	45,346