Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	$ 1,837	$ (5,100)	$ 3,800
Liabilities
Employee compensation and benefits	16,807	17,880
Post-retirement	846	4,652
Total Liabilities	$ 17,653	$ 22,532