Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 21,882	$ 50,874
Short-term investments	76,141	14,232
Accounts receivable – net
Trade	174,499	168,459
Other	8,845	14,006
Inventories of spare parts – net	54,242	56,698
Prepaid expenses	13,072	11,419
Income taxes receivable	509	950
Total current assets	349,190	316,638
Property and equipment – net	885,669	902,485
Right of use assets	144,944
Restricted cash and investments	19,739	19,781
Other assets	20,937	18,378
Deferred income taxes	5,137	4,944
Total assets	1,425,616	1,262,226
Current Liabilities:
Senior Notes issued March 17, 2014, net of debt issuance cost of $260		499,740
Accounts payable	70,615	50,289
Accrued and other current liabilities	38,483	45,292
Current portion of operating lease liabilities	27,535
Current maturities of long term debt	1,750	500,000
Total current liabilities	138,383	595,321
Long-term debt:
Term loan issued March 13, 2019, net of debt issuance costs of $5,254	62,996
Related party term loan issued September 28, 2018, net of debt issuance costs of $546 and $765, respectively	129,454	129,235
Deferred income taxes	51,964	59,178
Other long-term liabilities	3,673	5,059
Long-term operating lease liabilities	118,167
Total liabilities not subject to compromise	504,637	788,793
Liabilities subject to compromise	513,125
Total liabilities	1,017,762	788,793
Commitments and contingencies (Note 11)
Shareholders’ Equity:
Additional paid-in capital	316,143	314,316
Accumulated other comprehensive income (loss)	(4,040)	(3,952)
Retained earnings	94,169	161,487
Total shareholders’ equity	407,854	473,433
Total liabilities and shareholders’ equity	1,425,616	1,262,226
Voting Common Stock [Member]
Shareholders’ Equity:
Common stock	291	291
Non-Voting Common Stock [Member]
Shareholders’ Equity:
Common stock	1,291	1,291
Total shareholders’ equity	$ 1,291	$ 1,291