Leases (Tables)

12 Months Ended

Dec. 31, 2011

Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

	Capital		Operating
	Leases		Leases
Year Ended December 31,
2012	$	13,179	$	88,502
2013	11,417		82,568
2014	10,037		69,702
2015	8,406		57,418
2016	7,444		37,769
Thereafter	35,667		149,771
Total minimum lease payments	$	86,150	$	485,730
Less amount representing interest (0.75% – 7.36%)	22,029
Present value of minimum lease payments	64,121
Less amount due in one year	8,932
Total Long-Term Capital Lease Obligation	$	55,189