Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 124	$ 4,367
Accounts receivable, less allowances of $3,548 in 2015 and $3,868 in 2014	124,222	128,367
Prepaid expenses and other	14,197	13,687
Income tax receivable	15,745	18,335
Other current assets	4,701	5,420
Total current assets	158,989	170,176
Property and Equipment, at cost	995,514	891,145
Less-accumulated depreciation	456,335	407,505
Net property and equipment	539,179	483,640
Goodwill	12,025	5,231
Identifiable Intangibles, net	14,961	2,943
Other Noncurrent Assets	4,039	4,995
Total assets	729,193	666,985
Current Liabilities:
Accounts payable	54,754	42,388
Wages, vacation and employees’ benefits	27,834	28,777
Claims and insurance accruals	26,903	29,314
Other current liabilities	19,457	20,862
Current portion of long-term debt	12,432	9,138
Total current liabilities	141,380	130,479
Other Liabilities:
Long-term debt, less current portion	56,540	73,897
Deferred income taxes	67,417	58,946
Claims, insurance and other	35,967	36,757
Total other liabilities	$ 159,924	$ 169,600
Commitments and Contingencies
Stockholders’ Equity:
Preferred stock, $0.001 par value, 50,000 shares authorized, none issued and outstanding
Common stock, $0.001 par value, 50,000,000 shares authorized, 25,141,799 and 24,871,806 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	$ 25	$ 25
Additional paid-in-capital	230,593	223,713
Deferred compensation trust, 165,971 and 193,607 shares of common stock at cost at December 31, 2015 and December 31, 2014, respectively	(3,102)	(2,189)
Retained earnings	200,373	145,357
Total stockholders’ equity	427,889	366,906
Total liabilities and stockholders’ equity	$ 729,193	$ 666,985