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EMPLOYEE BENEFIT PLANS - Obligation and Funded Status (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Change in benefit obligation:      
Benefit obligation at beginning of year $ 20,669 $ 19,289  
Interest cost 706 756 $ 775
Actuarial loss 141 159  
Benefits paid (797) (782)  
Other, change in actuarial assumptions (1,697) 1,247  
Benefit obligation at end of year 19,022 20,669 19,289
Change in plan assets:      
Fair value of plan assets at beginning of year 17,486 15,090  
Actual return on plan assets (1,078) 2,424  
Employer contribution 750 750  
Benefits paid (797) (782)  
Adjustment to fair value of plan assets 5 4  
Fair value of plan assets at end of year 16,366 17,486 $ 15,090
Funded status (2,656) (3,183)  
Accounts recognized on balance sheet as:      
Total liabilities (2,656) (3,183)  
Amounts recognized in accumulated other comprehensive income (loss) consist of:      
Net loss $ 6,678 $ 6,227