Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net loss attributable to stockholders (In thousands)	$ (8,659)	$ (67,237)	$ (16,858)	$ (75,393)
Basic weighted average shares outstanding (in shares)	162,156,470	168,972,601	162,124,624	172,003,465
Basic and diluted net loss per share attributable to stockholders (in dollars per share)	$ (0.05)	$ (0.40)	$ (0.10)	$ (0.44)