Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies [Abstract]

Summary of future capital lease, operating lease and financing lease obligation

At December 31, 2012, payments required on operating leases, capital leases and financing obligations are as follows:

	Operating Leases		Capital Leases			Financing Obligations
2013	$	53,666	$	6,067		$	28,300
2014		52,070		5,963			28,333
2015		50,353		6,036			28,988
2016		45,926		5,894			29,415
2017		38,826		5,918			31,399
Thereafter		210,539		20,001			316,289
Total minimum lease payments	$	451,380		49,879			462,724
Less amounts representing interest ranging from 3.6% to 19.6%				(23,221	)		(264,235	)
Present value of future minimum lease payments				26,658			198,489
Less current maturities				(1,941	)		(2,481	)
Long-term obligations			$	24,717		$	196,008