Employee Benefit Plans (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Components of net pension cost
Pension expense - three months ended March 31, (actual)	$ 352	$ 307
Pension
Components of net pension cost
Service cost - benefits earned during the year	1,343	1,179
Interest costs on projected benefit obligations	1,008	956
Expected return on plan assets	(1,123)	(1,057)
Expected administrative expenses	88	70
Amortization of prior service cost	79	79
Amortization of unrecognized net loss	11	0
Net periodic pension expense	1,406	1,227
Pension expense - three months ended March 31, (actual)	$ 352	$ 307