Pension Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 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	$ 11	$ 17	$ 35	$ 49
Interest cost	143	135	428	403
Amortization of prior service cost	0	22	0	68
Amortization of actuarial loss	43	46	129	140
Net periodic benefit cost	197	$ 220	592	$ 660
Unfunded pension plan obligations	15,100		15,100		$ 14,900
Cash surrender value of life insurance policies	$ 4,400		$ 4,400		$ 3,800