Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 62,468	$ 34,924
Receivables:
Trade, net of allowance for doubtful accounts	67,663	136,161
Unbilled receivables	12,635	38,002
Insurance recoveries	15,782	10,900
Other receivables	7,158	5,138
Deferred income taxes	5,996	10,998
Inventory	9,528	14,117
Assets held for sale	4,056	9,909
Prepaid expenses and other current assets	7,679	8,925
Total current assets	192,965	269,074
Property and equipment, at cost	1,510,666	1,702,273
Less accumulated depreciation	729,575	845,732
Net property and equipment	781,091	856,541
Intangible assets, net of accumulated amortization of $44.1 million and $40.3 million at June 30, 2015 and December 31, 2014, respectively	20,253	24,223
Noncurrent deferred income taxes	0	2,753
Other long-term assets	10,588	18,998
Total assets	1,004,897	1,171,589
Current liabilities:
Accounts payable	49,302	64,305
Current portion of long-term debt	0	27
Deferred revenues	26,113	3,315
Accrued expenses:
Payroll and related employee costs	17,113	40,058
Insurance premiums and deductibles	9,501	12,829
Insurance claims and settlements	15,782	10,900
Interest	5,467	5,432
Other	7,920	10,326
Total current liabilities	131,198	147,192
Long-term debt, less current portion	410,000	455,053
Noncurrent deferred income taxes	54,556	69,578
Other long-term liabilities	3,097	4,702
Total liabilities	$ 598,851	$ 676,525
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; 64,481,110 and 63,820,126 shares outstanding at June 30, 2015 and December 31, 2014, respectively	6,494	6,414
Additional paid-in capital	473,370	472,457
Treasury stock, at cost; 454,577 and 317,103 shares at June 30, 2015 and December 31, 2014, respectively	(3,741)	(3,030)
Accumulated earnings	(70,077)	19,223
Total shareholders' equity	406,046	495,064
Total liabilities and shareholders' equity	$ 1,004,897	$ 1,171,589