Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies

Schedule of future minimum payments under non-cancellable capitalized and operating leases

	Capitalized Leases			Operating Leases
2012	$	29,843		$	22,435
2013		20,948			16,310
2014		17,273			13,471
2015		5,980			7,327
2016		61			4,869
Thereafter		—			2,936
Total		74,105		$	67,348
Less: amount representing interest and other executory costs		(6,002	)
Present value of minimum lease payments	$	68,103