Leased Equipment under Capital Leases (Tables)

3 Months Ended

Mar. 31, 2013

Leased Equipment under Capital Leases [Abstract]

Schedule of Capital Leased Assets [Table Text Block]

	March 31, 2013		December 31, 2012
Leased equipment under capital leases
Leased equipment under capital leases	$	175,793	$	84,650
Less: payments under capital lease obligations		14,813		16,116
Leased equipment under capital leases, net	$	160,980	$	68,534