Leases

The Company has non-cancelable operating leases, primarily for land, tower space, office-space, certain office equipment and vehicles. The operating leases generally contain renewal options for periods ranging from one to ten years and require the Company to pay all executory costs such as maintenance and insurance. Rental expense for operating leases was approximately $22.6 million, $25.9 million, and $27.4 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Future minimum payments under non-cancelable operating leases (with initial or remaining lease terms in excess of one year), future minimum sublease income to be received and a lease commitment under a sales leaseback agreement as of December 31, 2013 are as follows (in thousands):



Year Ending December 31:	Future Minimum Rent Under Operating Leases		Future Minimum Sublease Income			Future Minimum Commitments Under Sales Leaseback Agreement		Net Commitments
2014	$	26,158	$	(1,962	)	$	1,040	$	25,236
2015	21,424		(1,710		)	1,040		20,754
2016	18,521		(269		)	1,076		19,328
2017	15,402		—			1,114		16,516
2018	10,720		—			1,153		11,873
Thereafter	32,198		—			1,193		33,391
	$	124,423	$	(3,941	)	$	6,616	$	127,098