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Summary of Significant Accounting Policies - Earnings Per Common Share (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Nov. 30, 2020
Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from computation of earnings per common share (in shares) 972,655 8,273,612 1,474,558    
Average share price (in dollars per share) $ 161.98        
Series A Units          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from computation of earnings per common share (in shares) 0 875,480 0    
Instruments to be settled in cash (at least) $ 101,700,000        
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      
2015 Notes          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Exchangeable senior notes $ 0        
Fixed interest rate       3.125% 3.125%
Shares related to the Notes included in the computation for diluted earnings per share (in shares)   0 993,114    
2013 Notes          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Shares related to the Notes included in the computation for diluted earnings per share (in shares) 0 0