Derivative Instruments and Hedging Activities - OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	$ (492)	$ (573)	$ 115	$ (2,422)
Reclassified from Accumulated OCI into Earnings
Effect of derivative instruments on earnings
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(390)	(795)	(648)	(1,630)
Foreign currency forward contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(138)	177	252	166
Foreign currency forward contracts | Reclassified from Accumulated OCI into Earnings
Effect of derivative instruments on earnings
Gain (Loss) Reclassified from Accumulated OCI into Earnings	(33)		(33)	67
Commodity futures contracts
Effect of derivative instruments on earnings
Gain (Loss) Recognized in OCI	(354)	(750)	(137)	(2,588)
Commodity futures contracts | Reclassified from Accumulated OCI into Earnings
Effect of derivative instruments on earnings
Gain (Loss) Reclassified from Accumulated OCI into Earnings	$ (357)	$ (795)	$ (615)	$ (1,697)