Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 53,891	$ 16,358
Accounts receivable, net of allowance of $1,352 in 2017 and $1,264 in 2016	65,563	77,247
Inventory	17,282	19,925
Prepaid supplies and other	23,699	19,123
TOTAL CURRENT ASSETS	160,435	132,653
Property and equipment, net	1,111,201	1,000,992
Hedging Assets, Noncurrent	60,605	0
Goodwill and acquired intangibles	45,317	45,586
Lease incentive	84,910	54,730
Intangibles	8,038	8,453
Convertible note hedges	24,435	25,369
Goodwill	37,279	37,133
TOTAL ASSETS	1,486,903	1,259,330
CURRENT LIABILITIES:
Accounts payable	75,820	60,704
Accrued salaries, wages and benefits	30,260	37,044
Accrued expenses	10,745	10,324
Current portion of debt obligations	19,247	29,306
Unearned revenue	29,186	18,407
TOTAL CURRENT LIABILITIES	165,258	155,785
Long term debt	473,924	429,415
Convertible note option	61,230	0
Post-retirement obligations	72,876	77,713
Other liabilities	48,039	52,542
Stock Warrants	229,965	89,441
Deferred income taxes	143,337	122,532
TOTAL LIABILITIES	1,194,629	927,428
Commitments and contingencies (Note H)
STOCKHOLDERS’ EQUITY:
Preferred stock, 20,000,000 shares authorized, including 75,000 Series A Junior Participating Preferred Stock	0	0
Common stock, par value $0.01 per share; 85,000,000 shares authorized; 59,123,112 and 59,461,291 shares issued and outstanding in 2017 and 2016, respectively	591	595
Additional paid-in capital	471,950	443,416
Accumulated deficit	(108,865)	(32,243)
Accumulated other comprehensive loss	(71,402)	(79,866)
TOTAL STOCKHOLDERS’ EQUITY	292,274	331,902
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,486,903	$ 1,259,330