Derivative Instruments and Hedging Activities (Derivatives Not Designated as Hedging Instruments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	$ 0	$ (5,150)
Commodity options
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	0	399
Foreign exchange forwards
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	0	187
Foreign exchange options
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	$ 0	$ (5,736)