Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investments schedule [Line Items]
Investments, at fair value	$ 4,630	$ 3,644
Rabbi Trust Associated With Deferred Compensation Plan [Member]
Investments schedule [Line Items]
Investments, at fair value	$ 4,609	3,626
Equity Securities [Member]
Investments schedule [Line Items]
Investments, at fair value		$ 18