Pension Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
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	$ 12	$ 16	$ 24	$ 32
Interest cost	143	134	285	268
Amortization of prior service cost	0	23	0	46
Amortization of actuarial loss	43	47	86	94
Net periodic benefit cost	198	$ 220	395	$ 440
Unfunded pension plan obligations	15,100		15,100		$ 14,900
Cash surrender value of life insurance policies	$ 4,400		$ 4,400		$ 3,800