XML 47 R37.htm IDEA: XBRL DOCUMENT v3.20.2
Earnings Per Common Share - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from computation of earnings per common share (in shares) 8,227,533 1,400,920 8,349,818 1,470,693  
Average share price (in dollars per share) $ 103.36 $ 115.63 $ 100.14 $ 105.74  
Exchangeable senior notes, net $ 575,000   $ 575,000   $ 569,513
Exchangeable Senior Notes 3.125% due 2035 (the 2015 Notes)          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Exchangeable senior notes, net $ 575,000   $ 575,000    
Debt stated interest rate 3.125%   3.125%    
Exchange price (in dollars per share) $ 90.91   $ 90.91    
Shares related to the Notes included in the computation for diluted earnings per share (in shares) 761,975 1,274,675 761,975 1,274,675  
Series A Units          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Exchangeable preferred operating partnership units settled in cash, minimum $ 101,700   $ 101,700    
Stock Options          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from computation of earnings per common share (in shares) 0 0 0 0