Benefit Plans (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	$ 2,549	$ 2,396	$ 2,218
Expense recorded	369	308	327
Other comprehensive loss (income) recorded	108	(45)	28
Ending balance	2,760	2,549	2,396
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	616	614	530
Expense recorded	132	47	56
Other comprehensive loss (income) recorded	108	(45)	28
Ending balance	$ 856	$ 616	$ 614