Quarterly Financial Information (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 217,122	$ 228,120	$ 225,597	$ 230,557	$ 233,396	$ 235,989	$ 234,500	$ 235,469	$ 901,396	$ 939,354	$ 973,649
Gain on sale of discontinued operations, net of taxes					0	0	0	10,044	0	10,044	0
Net loss	$ (43,624)	$ (37,778)	$ (22,680)	$ (32,237)	$ 6,103	$ (8,960)	$ (43,108)	$ (47,485)	$ (136,319)	$ (93,450)	$ (153,294)
Income (Loss) from Continuing Operations, Per Basic Share (USD per share)	$ (1.65)	$ (1.43)	$ (0.86)	$ (1.22)	$ 0.23	$ (0.34)	$ (1.64)	$ (2.20)	$ (5.15)	$ (3.95)	$ (5.90)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share (USD per share)					$ 0.00	$ 0.00	$ 0.00	$ 0.38	$ 0.00	$ 0.38	$ 0.00
Net (Loss) Income, Per Basic Share (USD per share)	$ (1.65)	$ (1.43)	$ (0.86)	$ (1.22)	$ 0.23	$ (0.34)	$ (1.64)	$ (1.82)	$ (5.15)	$ (3.57)	$ (5.90)
Income (Loss) from Continuing Operations, Per Diluted Share (USD per share)					$ 0.23	$ (0.34)	$ (1.64)	$ (2.20)	$ (5.15)	$ (3.95)	$ (5.90)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share (USD per share)					$ 0.00	$ 0.00	$ 0.00	$ 0.38	$ 0.00	$ 0.38	$ 0.00
Net (Loss) Income, Per Diluted Share (USD per share)					$ 0.23	$ (0.34)	$ (1.64)	$ (1.82)	$ (5.15)	$ (3.57)	$ (5.90)