Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Estimated Useful Lives Of Property And Equipment

Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the related assets. The following table provides the estimated useful lives by asset type:



Structures		7 to 30 years
Revenue equipment		4 to 15 years
Other equipment		2 to 20 years
Leasehold improvements		Lesser of economic life or life of lease

Expected Amortization Expenses For Intangible Assets

Annual amortization expense for the next five years for these intangible assets is estimated to be:



(In thousands)
2014	$	695
2015	$	495
2016	$	315
2017	$	210
2018	$	8

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]



	Year Ended December 31,
(In thousands)	2013		2012		2011
Acquisition of property and equipment by capital lease	$	—	$	1,094	$	8,570