Other, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Income and Expenses [Abstract]
Impairment of equity securities	$ (2,346)	$ (6,593)	$ (18,308)
Gain on extinguishment of Senior Notes	16,187	0	0
Foreign exchange gain (loss)	(15,769)	470	(189)
Gain on termination of reclamation bonds	0	0	8,519
Other	1,913	905	4,993
Other, net	$ (15)	$ (5,218)	$ (4,985)