XML 233 R165.htm IDEA: XBRL DOCUMENT v3.8.0.1
POST-RETIREMENT BENEFITS - Other Post-Retirement Benefits (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
year
Dec. 31, 2016
USD ($)
year
Disclosure of net defined benefit liability (asset) [line items]    
Weighted average duration of defined benefit obligation | year 10 10
Estimate of contributions, Less than a year $ 15 $ 19
Estimate of contributions, between 1-2 years 15 20
Estimate of contributions, between 2-5 years 41 56
Estimate of contributions, over 5 years 205 319
Total 276 414
Defined pension benefits    
Disclosure of net defined benefit liability (asset) [line items]    
Estimate of contributions, Less than a year 14 18
Estimate of contributions, between 1-2 years 14 19
Estimate of contributions, between 2-5 years 39 54
Estimate of contributions, over 5 years 200 313
Total 267 404
Other post-retirement benefits    
Disclosure of net defined benefit liability (asset) [line items]    
Estimate of contributions, Less than a year 1 1
Estimate of contributions, between 1-2 years 1 1
Estimate of contributions, between 2-5 years 2 2
Estimate of contributions, over 5 years 5 6
Total $ 9 $ 10