Pension Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Pension Plan [Abstract]
Highest consecutive years of employee compensation used to compute benefit			3 years
Years of employment used in benefit computation			10 years
Net Pension Cost [Abstract]
Service cost	$ 16	$ 15	$ 32	$ 30
Interest cost	134	156	268	311
Amortization of prior service cost	23	22	46	44
Amortization of acturial loss	47	32	94	64
Net periodic benefit cost	220	$ 225	440	$ 449
Unfunded pension plan obligations	$ 15,400		$ 15,400		$ 15,300