Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash, cash equivalents and restricted cash	$ 49,407	$ 59,322
Accounts receivable, net of allowance of $2,998 in 2019 and $1,444 in 2018	133,995	147,755
Inventory	32,750	33,536
Prepaid supplies and other	23,225	18,608
TOTAL CURRENT ASSETS	239,377	259,221
Property and equipment, net	1,569,840	1,555,005
Lease incentive	159,629	63,780
Other assets	76,301	57,220
Goodwill and acquired intangibles	536,229	535,359
Operating lease assets	50,586	0
Intangibles	140,255	144,614
Goodwill	395,974	390,745
TOTAL ASSETS	2,631,962	2,470,585
CURRENT LIABILITIES:
Accounts payable	117,408	109,843
Accrued salaries, wages and benefits	40,258	50,932
Accrued expenses	11,821	19,623
Current portion of debt obligations	34,707	29,654
Current portion of lease obligations	16,558	0
Unearned revenue	21,381	19,082
TOTAL CURRENT LIABILITIES	242,133	229,134
Long term debt	1,373,426	1,371,598
Post-retirement obligations	62,233	64,485
Long term lease obligations	32,631	0
Other liabilities	44,875	51,905
Stock Warrants	372,476	203,782
Deferred income taxes	113,374	113,243
TOTAL LIABILITIES	2,241,148	2,034,147
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; 110,000,000 shares authorized; 59,351,326 and 59,134,173 shares issued and outstanding in 2019 and 2018, respectively	594	591
Additional paid-in capital	471,245	471,158
Accumulated earnings	7,358	56,051
Accumulated other comprehensive loss	(88,383)	(91,362)
TOTAL STOCKHOLDERS’ EQUITY	390,814	436,438
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,631,962	$ 2,470,585