XML 57 R46.htm IDEA: XBRL DOCUMENT v3.19.2
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS Pension Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 100   $ 200  
Service cost 1,139 $ 1,312 2,288 $ 2,659
Interest cost 1,080 1,039 2,169 2,105
Expected return on plan assets (1,410) (1,500) (2,832) (3,040)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) (15) (12) (31) (24)
Net periodic benefit cost 794 839 1,594 1,700
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Other Nonoperating Gains (Losses) $ (300) $ (500) $ (700) $ (1,000)