Employee Benefits Plans (Details) - Amount recognized in accumulated other comprehensive income (loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Plan [Member]
Employee Benefits Plans (Details) - Amount recognized in accumulated other comprehensive income (loss) [Line Items]
Net loss (gain)	$ 1,614	$ 2,102
Supplemental Employee Retirement Plan [Member]
Employee Benefits Plans (Details) - Amount recognized in accumulated other comprehensive income (loss) [Line Items]
Net loss (gain)	$ 704	$ 832
Prior service cost (credit)
Total	$ 704	$ 832
Net loss (gain)	32
Other Postretirement Benefit Plan [Member]
Employee Benefits Plans (Details) - Amount recognized in accumulated other comprehensive income (loss) [Line Items]
Net loss (gain)	$ (149)	(152)
Prior service cost (credit)		(92)
Total	$ (149)	$ (244)
Net loss (gain)	$ (9)