Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 24,619	$ 53,566
Restricted cash	998	998
Receivables:
Trade, net of allowance for doubtful accounts	79,135	76,924
Unbilled receivables	12,590	24,822
Insurance recoveries	22,873	23,656
Other receivables	8,928	5,479
Inventory	22,453	18,898
Assets held for sale	3,447	3,582
Prepaid expenses and other current assets	7,869	7,109
Total current assets	182,912	215,034
Property and equipment, at cost	1,119,546	1,118,215
Less accumulated depreciation	648,376	593,357
Net property and equipment	471,170	524,858
Deferred income taxes	11,540	0
Operating lease assets	7,264	0
Other noncurrent assets	1,068	1,658
Total assets	673,954	741,550
Current liabilities:
Accounts payable	32,551	36,766
Deferred revenues	1,339	1,722
Accrued expenses:
Employee compensation and related costs	13,781	24,747
Insurance claims and settlements	22,873	23,593
Insurance premiums and deductibles	5,940	5,482
Interest	5,452	6,148
Other	9,645	6,310
Total current liabilities	91,581	104,768
Long-term debt, less unamortized discount and debt issuance costs	467,699	464,552
Noncurrent operating lease liabilities	5,700	0
Deferred income taxes	4,417	3,688
Other noncurrent liabilities	481	3,484
Total liabilities	569,878	576,492
Commitments and contingencies (Note 13)
Shareholders' equity:
Preferred stock, 10,000,000 shares authorized; none issued and outstanding	0	0
Common stock $.10 par value; 200,000,000 shares authorized; 79,202,216 and 78,214,550 shares outstanding at December 31, 2019 and December 31, 2018, respectively	8,008	7,900
Additional paid-in capital	553,210	550,548
Treasury stock, at cost; 877,047 and 789,532 shares at December 31, 2019 and December 31, 2018, respectively	(5,090)	(4,965)
Accumulated deficit	(452,052)	(388,425)
Total shareholders' equity	104,076	165,058
Total liabilities and shareholders' equity	$ 673,954	$ 741,550