XML 140 R122.htm IDEA: XBRL DOCUMENT v3.21.2
Stockholders' equity - Common stock - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Stockholders Equity Note                
Cash dividends $ 36,294 [1] $ 33,663 [1] $ 70,048 [2] $ 69,168 [2]        
Stockholders' equity $ 5,814,614 $ 5,780,165 $ 5,814,614 $ 5,780,165 $ 5,897,559 $ 6,028,687 $ 5,669,605 $ 6,016,779
Dividends Declared per Common Share $ 0.45 $ 0.40 $ 0.85 $ 0.80        
Dividend payable, to be paid date     Jul. 01, 2021          
Dividends payable, record date     May 26, 2021          
[1] Dividends declared per common share during the quarter ended June 30, 2021 - $0.45 (2020 - $0.40).
[2] Dividends declared per common share during the six months ended June 30, 2021 - $0.85 (2020 - $0.80).