Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenues	$ 221,569	$ 228,120	$ 649,641	$ 684,274
Operating expenses:
Cost of services and sales, excluding depreciation and amortization	100,718	104,643	333,067	321,870
Other post-employment benefit and pension expense	(57,568)	19,832	(116,926)	56,317
Selling, general and administrative expense	49,688	75,937	158,968	200,844
Depreciation and amortization	56,296	56,618	167,420	165,769
Reorganization related expense	6	12	33	77
Total operating expenses	149,140	257,042	542,562	744,877
Income/(loss) from operations	72,429	(28,922)	107,079	(60,603)
Interest expense	(20,186)	(20,195)	(59,979)	(60,226)
Other	153	90	425	81
Total other expense	(20,033)	(20,105)	(59,554)	(60,145)
Income/(loss) before income taxes	52,396	(49,027)	47,525	(120,748)
Income tax benefit	658	11,249	581	28,053
Net income/(loss)	$ 53,054	$ (37,778)	$ 48,106	$ (92,695)
Weighted average shares outstanding:
Basic, in shares	26,676,385	26,472,162	26,640,103	26,439,870
Diluted, in shares	27,003,833	26,472,162	26,952,296	26,439,870
Income/(loss) per share, basic	$ 1.99	$ (1.43)	$ 1.81	$ (3.51)
Income/(loss) per share, diluted	$ 1.96	$ (1.43)	$ 1.78	$ (3.51)