Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

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)
2013	$	712
2014	$	695
2015	$	495
2016	$	315
2017	$	210

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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