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Share-Based Compensation And Other Related Information - Restricted Stock Unit Activity (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation $ 3,024 $ 4,448
Restricted Share Units [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation $ 5,000 $ 2,500
Other equity instruments outstanding. beginning (shares | shares 299,216 328,823
Granted (shares) | shares 261,224 146,594
Paid out (shares) | shares (148,049) (157,584)
Forfeited (shares) | shares (15,819) (18,617)
Other equity instruments outstanding, ending (shares) | shares 396,572 299,216
Fair value of other equity instruments outstanding, beginning $ 7,107 $ 3,624
Granted, fair value 6,302 3,891
Paid out, fair value (4,762) (3,140)
Forfeited, fair value (545) (441)
Change in value, fair value 5,628 3,173
Fair value of other equity instruments outstanding, ending $ 13,730 $ 7,107
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%