Discontinued Operations and Assets Held for Sale - Net Assets for Entities and Operations Included in Discontinued Operations (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets:
Land, buildings, vessels and equipment, net	$ 0	$ 300
Other assets, net	9,800	9,600
Total assets	$ 9,780	$ 9,938