Pension Plan (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 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
Interest cost	142	134
Amortization of prior service cost	0	23
Amortization of acturial loss	43	47
Net periodic benefit cost	197	$ 220
Unfunded pension plan obligations	15,000		$ 14,900
Cash surrender value of life insurance policies	$ 4,300		$ 3,800