Stockholders' Equity Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stockholders' Equity Note [Abstract]
Net loss	$ (58,920)	$ (72,298)	$ (79,626)	$ (88,296)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(378)	1,041	(4,692)	626
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax	1,837	254	2,859	507
Total comprehensive loss	$ (57,461)	$ (71,003)	$ (81,459)	$ (87,163)