Commitments (Tables)

12 Months Ended

Dec. 31, 2011

Commitments [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

The aggregate minimum rentals under operating leases with non-cancelable terms of one year or more as of December 31, 2011 are as follows:

	Lease Commitments		Sublease Rentals		Net
Year Ending December 31:
2012	$	5,231	$	965	$	4,266
2013	2,603		402		2,201
2014	2,585		—		2,585
2015	2,040		—		2,040
2016	1,410		—		1,410
Thereafter	4,812		—		4,812
Total	$	18,681	$	1,367	$	17,314