Defined Benefit Plan (Schedule of Net Periodic Pension Cost (Benefit))(Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of net periodic pension cost (benefit)
Service cost	$ 297	$ 245	$ 587	$ 487
Interest cost	62	85	123	169
Expected return on plan assets	(298)	(396)	(589)	(788)
Prior service cost amortization	38	36	75	71
Deferred loss amortization	62	11	122	22
Net periodic pension cost (benefit)	$ 161	$ (19)	$ 318	$ (39)