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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

Future minimum lease payments for operating leases

Future minimum lease payments for operating leases with initial or remaining noncancelable lease terms in excess of one year are as follows:

	2012		$23,565
	2013		18,272
	2014		14,970
	2015		11,960
	2016		10,318
	Thereafter		17,989

Estimated purchase commitments under 2008 Tower agreement

Management estimates its purchase commitments under the Tower agreement as follows:

	2012		$22,569
	2013		7,106
	2014		6,890
	2015		6,890

- Definition

Tabular disclosure of unconditional purchase obligations that are not recognized as a liability on the balance sheet, including the nature and significant terms of an unconditional purchase obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the amount purchased under the obligation (for example, the take-or-pay or throughput contract) for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value.

+ References+ Details