Employee Benefit Plans (Details 3) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost
Prior service cost	$ (543)
Net actuarial loss	3,033
Pension Benefits
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost
Prior service cost	0
Net actuarial loss	1,516
Postretirement Benefits
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost
Prior service cost	(543)
Net actuarial loss	$ 1,517