Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 25,242	$ 17,697
Accounts receivable, net of allowance of $293 in 2016 and $415 in 2015	51,510	57,986
Inventory	14,713	12,963
Prepaid supplies and other	12,167	12,660
TOTAL CURRENT ASSETS	103,632	101,306
Property and equipment, net	934,219	875,401
Other assets	75,240	26,285
Goodwill and acquired intangibles	38,589	38,729
Intangibles	4,194
TOTAL ASSETS	1,151,680	1,041,721
CURRENT LIABILITIES:
Accounts payable	40,755	44,417
Accrued salaries, wages and benefits	24,254	27,454
Accrued expenses	8,858	8,107
Current portion of debt obligations	41,637	33,740
Unearned revenue	12,081	12,963
TOTAL CURRENT LIABILITIES	127,585	126,681
Long term debt	323,461	283,918
Post-retirement obligations	104,316	108,194
Other liabilities	61,777	61,913
Stock warrants	57,128	0
Deferred income taxes	109,358	96,858
TOTAL LIABILITIES	783,625	677,564
Commitments and contingencies (Notes B and G)
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; 63,513,853 and 64,077,140 shares issued and outstanding in 2016 and 2015, respectively	635	641
Additional paid-in capital	497,750	518,259
Accumulated deficit	(35,938)	(55,731)
Accumulated other comprehensive loss	(94,392)	(99,012)
TOTAL STOCKHOLDERS’ EQUITY	368,055	364,157
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,151,680	$ 1,041,721