Goodwill (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Balance		$ 0	$ 265,423
Goodwill impairment	$ 0	$ 0	(265,423)
Balance			$ 0