Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Assets
Collateral investments	$ 1,783	$ 3,624
Deferred costs, less current portion	1,479	828
Deferred financing costs - revolving credit facility	892
Other	663	834
Other assets	$ 4,817	$ 5,286