Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 14,578	$ 14,160
Receivables:
Trade, net of allowance for doubtful accounts	35,810	47,577
Unbilled receivables	2,121	13,624
Insurance recoveries	17,611	14,556
Other receivables	3,337	4,059
Inventory	8,640	9,262
Assets held for sale	4,513	4,619
Prepaid expenses and other current assets	5,889	7,411
Total current assets	92,499	115,268
Property and equipment, at cost	1,135,346	1,146,994
Less accumulated depreciation	480,552	444,409
Net property and equipment	654,794	702,585
Intangible assets, net of accumulated amortization of $12.7 million and $12.3 million at June 30, 2016 and December 31, 2015, respectively	1,166	1,944
Deferred income taxes	15	18
Other long-term assets	2,050	2,178
Total assets	750,524	821,993
Current liabilities:
Accounts payable	13,077	16,951
Deferred revenues	2,848	6,222
Accrued expenses:
Payroll and related employee costs	13,391	13,859
Insurance premiums and deductibles	6,530	8,087
Insurance claims and settlements	14,058	14,556
Interest	5,489	5,508
Other	3,826	4,859
Total current liabilities	59,219	70,042
Long-term debt, less debt issuance costs	387,551	387,217
Deferred income taxes	15,100	17,520
Other long-term liabilities	3,508	4,571
Total liabilities	465,378	479,350
Commitments and contingencies (Note 9)
Shareholders' equity:
Preferred stock, 10,000,000 shares authorized; none issued and outstanding	0	0
Common stock $.10 par value; 100,000,000 shares authorized; 65,071,906 and 64,497,915 shares outstanding at June 30, 2016 and December 31, 2015, respectively	6,559	6,496
Additional paid-in capital	476,077	475,823
Treasury stock, at cost; 515,546 and 458,170 shares at June 30, 2016 and December 31, 2015, respectively	(3,883)	(3,759)
Accumulated deficit	(193,607)	(135,917)
Total shareholders' equity	285,146	342,643
Total liabilities and shareholders' equity	$ 750,524	$ 821,993