Leases (Tables)

12 Months Ended

Dec. 31, 2011

Leases [Abstract]

Future minimum rental payments under non-cancelable operating leases

At December 31, 2011, future minimum rental payments under noncancelable operating leases are as follows:

	Operating Leases
	(in thousands)
2012	$	13,488
2013		11,681
2014		8,327
2015		5,078
2016		3,659
Thereafter		1,884
Total minimum lease payments	$	44,117