Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies [Abstract]

Schedule Of Future Minimum Lease Payments

Years ending December 31:		Operating		Capital
2013	$	27,764		11,775
2014		23,809		11,784
2015		22,527		11,794
2016		19,600		11,804
2017		15,411		11,783
2018 and thereafter		64,944		54,948
Total minimum lease payments	$	174,055		113,888
Less amount representing interest				33,276
Less current maturity of obligations under capital leases				5,995
Long-term obligations under capital leases, excluding current maturity			$	74,617

Schedule Of Operating Lease Receivables Minimum Payments [Table Text Block]

Years ending December 31,
2013	$	11,322
2014		6,325
2015		5,094
2016		4,969
2017		4,949
2018 and thereafter		27,064
Total minimum future service revenues	$	59,723