Deferred Compensation and Other Benefits - Additional Information (Details) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2016
NDBP [Member]
Deferred Compensation Text Details [Line Items]
Net periodic pension cost	$ 18,000			$ 19,000	$ 55,000	$ 55,000
Targeted minimum return					4.00%
Guaranteed rate of return					4.00%
Deferred Compensation and Other Benefits [Member] | Former Key Employee Executive Officer [Member]
Deferred Compensation Text Details [Line Items]
Benefit paid	$ 100,000				$ 500,000
Deferred Compensation and Other Benefits [Member] | Current Key Employee Executive Officer [Member]
Deferred Compensation Text Details [Line Items]
Employer contributions			$ 200,000
Common stock units issued under plan	0	0	5,000
Deferred Compensation and Other Benefits [Member] | Non-Employee Director [Member]
Deferred Compensation Text Details [Line Items]
Employer contributions	$ 0				$ 300,000
Deferred Compensation and Other Benefits [Member] | Forecast [Member]
Deferred Compensation Text Details [Line Items]
Estimated 2016 full year benefit payments							$ 700,000