Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 39,834	$ 17,697
Accounts receivable, net of allowance of $414 in 2016 and $415 in 2015	57,865	57,986
Inventory	13,513	12,963
Prepaid supplies and other	10,477	12,660
TOTAL CURRENT ASSETS	121,689	101,306
Property and equipment, net	914,838	875,401
Other assets	25,294	26,285
Goodwill and acquired intangibles	76,245	38,729
TOTAL ASSETS	1,138,066	1,041,721
CURRENT LIABILITIES:
Accounts payable	42,473	44,417
Accrued salaries, wages and benefits	24,461	27,454
Accrued expenses	8,298	8,107
Current portion of debt obligations	37,734	33,740
Unearned revenue	11,991	12,963
TOTAL CURRENT LIABILITIES	124,957	126,681
Long term debt	333,766	283,918
Post-retirement obligations	106,001	108,194
Other liabilities	63,935	61,913
Deferred income taxes	100,965	96,858
TOTAL LIABILITIES	$ 729,624	$ 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; 75,000,000 shares authorized; 64,068,782 and 64,077,140 shares issued and outstanding in 2016 and 2015, respectively	641	641
Additional paid-in capital	551,914	518,259
Accumulated deficit	(47,513)	(55,731)
Accumulated other comprehensive loss	(96,600)	(99,012)
TOTAL STOCKHOLDERS’ EQUITY	408,442	364,157
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,138,066	$ 1,041,721