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Share-Based Compensation And Other Related Information - Restricted Stock Unit Activity (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation $ 4,448 $ 2,957
Restricted Share Units [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation $ 2,500 $ 1,700
Other equity instruments outstanding. beginning (shares | shares 328,823 262,013
Granted (shares) | shares 146,594 244,961
Paid out (shares) | shares (157,584) (156,715)
Forfeited (shares) | shares (18,617) (21,436)
Other equity instruments outstanding, ending (shares) | shares 299,216 328,823
Fair value of other equity instruments outstanding, beginning $ 3,624 $ 4,098
Granted, fair value 3,891 3,207
Paid out, fair value (3,140) (2,181)
Forfeited, fair value (441) (313)
Change in value, fair value 3,173 (1,187)
Fair value of other equity instruments outstanding, ending $ 7,107 $ 3,624
First Anniversary of Grant [member] | Restricted Share Units [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Award vesting (percent) 33.30%  
Second Anniversary of Grant [member] | Restricted Share Units [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Award vesting (percent) 33.30%  
Third Anniversary of Grant [member] | Restricted Share Units [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Award vesting (percent) 33.30%