Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash, cash equivalents and restricted cash	$ 71,063	$ 46,201
Accounts receivable, net of allowance of $1,324 in 2020 and $975 in 2019	166,993	162,870
Inventory	43,278	37,397
Prepaid supplies and other	26,027	20,323
TOTAL CURRENT ASSETS	307,361	266,791
Property and equipment, net	1,835,176	1,766,020
Lease incentive	141,821	146,678
Other assets	62,189	68,733
Goodwill and acquired intangibles	524,795	527,654
Operating lease assets	48,698	44,302
Intangibles	128,821	131,680
Goodwill	395,974	395,974
TOTAL ASSETS	2,920,040	2,820,178
CURRENT LIABILITIES:
Accounts payable	136,781	141,094
Accrued salaries, wages and benefits	49,328	59,429
Accrued expenses	19,716	17,586
Current portion of debt obligations	13,773	14,707
Current portion of lease obligations	13,340	12,857
Unearned revenue	20,863	17,566
TOTAL CURRENT LIABILITIES	253,801	263,239
Long term debt	1,546,867	1,469,677
Post-retirement obligations	33,021	36,744
Long term lease obligations	34,642	30,334
Other liabilities	50,324	49,293
Stock Warrants	265,104	383,073
Deferred income taxes	136,978	127,476
TOTAL LIABILITIES	2,320,737	2,359,836
Commitments and contingencies (Note I)
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; 150,000,000 shares authorized; 59,623,195 and 59,329,431 shares issued and outstanding in 2020 and 2019, respectively	596	593
Additional paid-in capital	476,423	475,720
Retained earnings	183,400	45,895
Accumulated other comprehensive loss	(61,116)	(61,866)
TOTAL STOCKHOLDERS’ EQUITY	599,303	460,342
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,920,040	$ 2,820,178