Profit-Sharing, Pension, and Other Postretirement Benefit Plans (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Change in Benefit Obligation:
Benefit obligation, beginning of period	$ 12,613	$ 11,413
Interest cost	421	461
Actuarial loss (gain)	(925)	1,930
Benefits paid	(1,113)	(1,191)
Benefit obligation, end of period	10,996	12,613
Change in Plan Assets:
Company contributions	1,113	1,191
Benefits paid	(1,113)	(1,191)
Unfunded status	(10,996)	(12,613)
Accrued benefit cost	(10,996)	(12,613)
Amounts recognized in the Consolidated Balance Sheets
Current accrued benefit liability	(1,093)	(1,173)
Non-current accrued benefit liability	(9,903)	(11,440)
Net amount recognized	$ (10,996)	$ (12,613)