Basis of Presentation (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Consolidated Balance Sheet Line Item
Other current assets	$ 10,852	$ 9,863
Deferred income taxes	48,963	63,809
Accrued liabilities	(45,969)	(47,174)
Post retirement obligations	(7,066)	(7,230)
Other long-term obligations	$ (3,102)	(9,169)
As previously reported
Consolidated Balance Sheet Line Item
Other current assets		15,888
Deferred income taxes		58,544
Accrued liabilities		(53,905)
Post retirement obligations		(2,703)
Other long-term obligations		(7,725)
Reclassification adjustment
Consolidated Balance Sheet Line Item
Other current assets		(6,025)
Deferred income taxes		5,265
Accrued liabilities		6,731
Post retirement obligations		(4,527)
Other long-term obligations		$ (1,444)