XML 79 R64.htm IDEA: XBRL DOCUMENT v3.21.1
Stockholders' equity and dividend payment, Dividend payment (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Feb. 25, 2021
Nov. 25, 2020
Sep. 02, 2020
May 26, 2020
Feb. 25, 2020
Nov. 14, 2019
Aug. 29, 2019
May 28, 2019
Feb. 26, 2019
Nov. 23, 2018
Aug. 31, 2018
May 30, 2018
Feb. 28, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dividend Payment [Abstract]                                
Total payment   $ 34,200 $ 82,000 $ 51,500 $ 47,000 $ 7,300 $ 2,800 $ 11,400 $ 7,100 $ 2,900 $ 2,900 $ 2,900 $ 2,900 $ 214,669 $ 28,685 $ 11,487
Per common share (in dollars per share)   $ 0.20 $ 0.48 $ 0.35 $ 0.32 $ 0.05 $ 0.02 $ 0.08 $ 0.05 $ 0.02 $ 0.02 $ 0.02 $ 0.02 $ 1.35 $ 0.20 $ 0.08
Subsequent Events [Member]                                
Dividend Payment [Abstract]                                
Per common share (in dollars per share) $ 0.05                              
Dividends payable date Feb. 25, 2021                              
Dividend paid, record date Feb. 18, 2021                              
Dividend paid $ 8,600