Accrued Liabilities and Other Liabilities - Components of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accrued Liabilities
Accrued product related costs	$ 5,245	$ 5,216
Accrued income taxes	8,845	3,346
Accrued property and other taxes	1,838	2,547
Dividends payable	1,302	1,336
Remediation reserves	20,603	3,918	$ 5,116
Deferred income tax	6,731	9
Other accrued liabilities	9,341	8,984
Total accrued expenses and other liabilities	$ 53,905	$ 25,356