XML 168 R144.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Benefit - Maturity Profile of Defined Benefit Obligation (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of defined benefit plans [Line Items]    
Expected payments $ 25,137 $ 24,500
Weighted average duration of defined benefit obligation 9 years 10 years
Top of range [Member]    
Disclosure of defined benefit plans [Line Items]    
Weighted average duration of defined benefit obligation   11 years
Within one year [Member]    
Disclosure of defined benefit plans [Line Items]    
Expected payments $ 1,340 $ 855
Between 2 and 5 years [Member]    
Disclosure of defined benefit plans [Line Items]    
Expected payments 2,489 2,374
Between 6 and 10 years [Member]    
Disclosure of defined benefit plans [Line Items]    
Expected payments 4,391 4,187
Beyond 10 years [Member]    
Disclosure of defined benefit plans [Line Items]    
Expected payments $ 16,917 $ 17,084