Leases (Tables)

12 Months Ended

Dec. 31, 2011

Leases [Abstract]

Summary of future minimum lease payments for operating leases

	Minimum Lease Payments
	Domestic		Foreign		Total
Year ending December 31:
2012	$	10,711	$	1,836	$	12,547
2013		10,130		1,005		11,135
2014		8,043		789		8,832
2015		6,946		526		7,472
2016		5,098		268		5,366
Thereafter		44,872		167		45,039
Total		85,800		4,591		90,391