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Employee Benefit Plans and Similar Obligations (Tables)
 12 Months Ended
Dec. 31, 2018
Plan 2013-15 [member]  
Statement [LineItems]  
Summary of Share Based Benefit Plan

Plan 2013-2015

 

     2018      2017      2016  

Amount at the beginning of the year

      —          —          188,493  

- Granted

      —          —          9,130  

- Settled

      —          —          (193,878 ) 

- Expired

      —          —          (3,745 ) 
  

 

 

     

 

 

     

 

 

  

Amount at end of year(1)

      —          —          —    
  

 

 

     

 

 

     

 

 

  

Expense recognized during the year

      —          —          6  

Fair value of shares on grant date (in U.S. dollars)

      —          —          14.75  

 

(1)

The life of the plan in 2016 was 7 months.
Plan 2014-17 [member]  
Statement [LineItems]  
Summary of Share Based Benefit Plan

Plan 2014-2017

 

     2018      2017      2016  

Amount at the beginning of the year

      —          99,278        234,130  

- Granted

      —          6,269        6,978  

- Settled

      —          (105,201 )       (123,926 ) 

- Expired

      —          (346 )       (17,904 ) 
  

 

 

     

 

 

     

 

 

  

Amount at end of year(1)

      —          —          99,278  
  

 

 

     

 

 

     

 

 

  

Expense recognized during the year

      —          8        28  

Fair value of shares on grant date (in U.S. dollars)

      —          33.41        33.41  

 

(1)

The life of the plan in 2017 was 7 months, whereas the remaining life as of December 31, 2016 was 7 months.
Plan 2015-18 [member]  
Statement [LineItems]  
Summary of Share Based Benefit Plan

Plan 2015-2018

 

     2018      2017      2016  

Amount at the beginning of the year

      162,051        339,459        602,079  

- Granted

      —          2,682        —    

- Settled

      (155,385 )       (168,814 )       (202,227 ) 

- Expired

      (6,666 )       (11,276 )       (60,393 ) 
  

 

 

     

 

 

     

 

 

  

Amount at end of year(1)

      —          162,051        339,459  
  

 

 

     

 

 

     

 

 

  

Expense recognized during the year

      12        26        63  

Fair value of shares on grant date (in U.S. dollars)

      19.31        19.31        19.31  

 

(1)

The life of the plan in 2018 was 7 months, whereas the remaining life of the plan was 7 months as of December 31, 2017, and between 7 and 19 months as of December 31, 2016.
Plan 2016-19 [member]  
Statement [LineItems]  
Summary of Share Based Benefit Plan

Plan 2016-2019

 

     2018      2017      2016  

Amount at the beginning of the year

      393,972        682,307        —    

- Granted

      —          —          682,307  

- Settled

      (189,303 )       (228,981 )       —    

- Expired

      (21,589 )       (59,354 )       —    
  

 

 

     

 

 

     

 

 

  

Amount at end of year(1)

      183,080        393,972        682,307  
  

 

 

     

 

 

     

 

 

  

Expense recognized during the year

      54        59        56  

Fair value of shares on grant date (in U.S. dollars)

      16.99        16.99        16.99  

 

(1)

The average remaining life of the plan is 7 months as of December 31, 2018, between 7 and 19 months as of December 31, 2017 and between 7 and 31 months as of December 31, 2016.
Plan 2017-2020 [member]  
Statement [LineItems]  
Summary of Share Based Benefit Plan

Plan 2017-2020

 

     2018      2017      2016  

Amount at the beginning of the year

      644,949        —          —    

- Granted

      —          646,149        —    

- Settled

      (193,564 )       —          —    

- Expired

      (75,833 )       (1,200 )       —    
  

 

 

     

 

 

     

 

 

  

Amount at end of year(1)

      375,552        644,949        —    
  

 

 

     

 

 

     

 

 

  

Expense recognized during the year

      142        69        —    

Fair value of shares on grant date (in U.S.dollars)

      20.26        20.26        —    

 

(1)

The average remaining life of the plan is between 7 and 19 months as of December 31, 2018 and between 7 and 31 months as of December 31, 2017.
Plan 2018-2021 [member]  
Statement [LineItems]  
Summary of Share Based Benefit Plan

Plan 2018-2021

 

     2018      2017      2016  

Amount at the beginning of the year

      —          —          —    

- Granted

      761,512        —          —    
  

 

 

     

 

 

     

 

 

  

Amount at end of year(1)

      761,512        —          —    
  

 

 

     

 

 

     

 

 

  

Expense recognized during the year

      100        —          —    

Fair value of shares on grant date (in U.S. dollars)

      13.60        —          —    

 

(1)

The average remaining life of the plan is between 7 and 31 months as of December 31, 2018.