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Pension Plan (Details) - The funded status of the plan - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Change in benefit obligation:      
Projected benefit obligation at beginning of year $ 14,679 $ 11,883  
Interest cost 573 562  
Actuarial (gain) loss (1,192) 2,764  
Fair value of plan assets at beginning of year 7,946 7,077  
Actual return on plan assets (451) 441  
Company contributions 1,241 958  
Benefits paid (543) (530)  
Fair value of plan assets at end of year 8,193 7,946  
Funded status (underfunded) (5,324) (6,733)  
Projected benefit obligation at end of year 13,517 14,679  
Amounts recognized in other accumulated comprehensive loss:      
Net actuarial loss $ 6,797 $ 7,449 $ 4,886
Discount rate:      
Components of cost 4.00% 4.00%  
Benefit obligations 4.30% 4.80%  
Expected return on plan assets 8.00% 8.00%  
Rate of compensation increase