Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 15,457	$ 24,619
Restricted cash	998	998
Receivables:
Trade, net of allowance for doubtful accounts	64,836	79,135
Unbilled receivables	12,015	12,590
Insurance recoveries	22,379	22,873
Other receivables	3,693	8,928
Inventory	21,619	22,453
Assets held for sale	1,825	3,447
Prepaid expenses and other current assets	8,129	7,869
Total current assets	150,951	182,912
Property and equipment, at cost	1,083,512	1,119,546
Less accumulated depreciation	643,558	648,376
Net property and equipment	439,954	471,170
Deferred income taxes	9,264	11,540
Operating lease assets	7,972	7,264
Other noncurrent assets	7,593	1,068
Total assets	615,734	673,954
Current liabilities:
Accounts payable	28,774	32,551
Deferred revenues	997	1,339
Commitment premium	9,584	0
Debtor in possession financing	4,000	0
Accrued expenses:
Employee compensation and related costs	10,300	13,781
Insurance claims and settlements	22,239	22,873
Insurance premiums and deductibles	5,831	5,940
Interest	107	5,452
Other	11,196	9,645
Total current liabilities	93,028	91,581
Long-term debt, less unamortized discount and debt issuance costs	170,921	467,699
Noncurrent operating lease liabilities	6,434	5,700
Deferred income taxes	3,256	4,417
Other noncurrent liabilities	383	481
Total liabilities not subject to compromise	274,022	569,878
Liabilities subject to compromise	306,419	0
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; 79,579,571 and 79,202,216 shares outstanding at March 31, 2020 and December 31, 2019, respectively	8,062	8,008
Additional paid-in capital	553,484	553,210
Treasury stock, at cost; 1,041,565 and 877,047 shares at March 31, 2020 and December 31, 2019, respectively	(5,097)	(5,090)
Accumulated deficit	(521,156)	(452,052)
Total shareholders' equity	35,293	104,076
Total liabilities and stockholders' equity	$ 615,734	$ 673,954