Capital Leases	6 Months Ended
Jun. 30, 2011
Capital Leases [Abstract]
Capital Leases	Note 9. Capital Leases The Company leases certain revenue equipment under capital leases. The Company’s capital leases are typically structured with balloon payments at the end of the lease term equal to the residual value the Company is contracted to receive from certain equipment manufacturers upon sale or trade back to the manufacturers. The Company is obligated to pay the balloon payments at the end of the leased term whether or not it receives the proceeds of the contracted residual values from the respective manufacturers. Certain leases contain renewal or fixed price purchase options. Obligations under capital leases total $169.3 million at June 30, 2011, the current portion of which is $54.9 million. The leases are collateralized by revenue equipment with a cost of $376.1 million and accumulated amortization of $131.3 million at June 30, 2011. The amortization of the equipment under capital leases is included in depreciation and amortization of property and equipment.

Capital Leases

6 Months Ended

Jun. 30, 2011

Note 9. Capital Leases

The Company leases certain revenue equipment under capital leases. The Company’s capital leases are typically structured with balloon payments at the end of the lease term equal to the residual value the Company is contracted to receive from certain equipment manufacturers upon sale or trade back to the manufacturers. The Company is obligated to pay the balloon payments at the end of the leased term whether or not it receives the proceeds of the contracted residual values from the respective manufacturers. Certain leases contain renewal or fixed price purchase options. Obligations under capital leases total $169.3 million at June 30, 2011, the current portion of which is $54.9 million. The leases are collateralized by revenue equipment with a cost of $376.1 million and accumulated amortization of $131.3 million at June 30, 2011. The amortization of the equipment under capital leases is included in depreciation and amortization of property and equipment.