Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

At December 31, 2011, aggregate future minimum rental commitments under these leases are as follows (in thousands):

	Office Space		Equipment		Total
Year ending:
December 31, 2012	$	29,584	$	961	$	30,545
December 31, 2013	27,813		767		28,580
December 31, 2014	23,415		28		23,443
December 31, 2015	21,404		9		21,413
December 31, 2016	19,661		—		19,661
Thereafter	110,072		—		110,072
Total	$	231,949	$	1,765	$	233,714