Deferred Compensation Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Liability [Abstract]
Maximum deferral % of base compensation allowed to participants of deferred compensation plan	50.00%
Maximum deferral % of bonus compensation allowed to participants of deferred compensation plan	100.00%
Our discretionary contributions	$ 300	$ 400	$ 300
Our matching cash contributions represents this % of contributions made by participants of deferred compensation plan	50.00%
Maximum employer contribution match % (of total eligible compensation) to each participant of deferred compensation plan	4.00%
Deferred compensation plan liability	$ 11,394	$ 10,489