Operating Leases (Tables)

12 Months Ended

Dec. 31, 2011

Operating Leases [Abstract]

Summary of minimum annual lease payments for noncancelable operating leases

Minimum annual lease payments for noncancelable operating leases in effect at December 31, 2011 are as follows (in thousands):

2012	$	14,944
2013		12,119
2014		8,962
2015		6,127
2016		4,274
Thereafter		18,622
	$	65,048