Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Plan Changes in Fair Value of Plan Assets and Funded Status (Details)

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Employee Benefit Plans - Plan Changes in Fair Value of Plan Assets and Funded Status (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Change in projected benefits obligation:      
Projected benefit obligation at beginning of year $ 5,032 $ 4,833  
Service cost 157 147 $ 153
Interest cost 183 201 215
Actuarial (gain) loss (369) 82  
Benefits paid (258) (231)  
Projected benefit obligation at end of year 4,745 5,032 4,833
Change in plan assets:      
Fair value of plan assets at beginning of year 5,356 4,937  
Actual return on plan assets (185) 552  
Contributions by employer 400 98  
Benefits paid (258) (231)  
Fair value of plan assets at end of year 5,313 5,356 $ 4,937
Funded (unfunded) status at end of year $ 568 $ 324