Other Liabilities - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Customer deposits and accrued rebates	$ 3,276	$ 3,102
Dividends payable	5,273	4,478
Accrued litigation, claims and professional fees	690	417
Current portion of environmental reserves	1,015	1,322
Other accrued expenses	6,560	6,153
Other current liabilities, Total	$ 16,814	$ 15,472