Leases

12 Months Ended

Dec. 31, 2011

Leases

Leases

(9) Leases

        At December 31, 2011, we were obligated under operating leases covering office equipment, office and warehouse space, transponders and transportation equipment expiring at various dates. Future minimum lease payments required under our leasing arrangements at December 31, 2011 are approximately as follows:

	2012		2013		2014		2015		2016		Thereafter
Future minimum lease payments	$	16,700	$	14,900	$	14,200	$	11,500	$	8,500	$	12,000

        Total rental expense under these operating leases was approximately $20,100, $21,600 and $21,100 in the years ended December 31, 2011, 2010 and 2009, respectively.

        We have entered into several operating lease agreements, some of which contain provisions for future rent increases, rent-free periods, or periods in which rent payments are reduced (abated). The total amount of rental payments due over the lease term is being charged to rent expense on the straight-line method over the term of the lease. The difference between rent expense recorded and the amount paid is credited or charged to deferred rent obligation, which is included in other current liabilities and other long-term liabilities in the accompanying Consolidated Balance Sheet.