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Equity (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jul. 31, 2020
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 280,000,000 280,000,000    
Preferred stock, shares authorized (in shares) 50,000,000 50,000,000    
Common stock shares issued in connection with stock options exercised (in shares) 2,759      
Common stock issued through the dividend reinvestment plan (in shares) 2,844 2,747 2,069  
Common stock shares issued in connection with stock grants (in shares)   0 0  
Number of shares withheld to satisfy employees' tax withholding and other liabilities (in shares) 75,780 74,173 84,710  
Common shares issued under Employee Stock Purchase Plan (in shares) 21,362      
Number of shares forfeited (in shares) 4,109      
Repurchase of common stock (in shares) 0      
Stock repurchase program, remaining authorized repurchase amount $ 316,148,000      
Issuance of common stock, net $ 31,874,000 $ 3,464,000 $ 409,725,000  
2020 Stock Repurchase Program        
Class of Stock [Line Items]        
Authorized amount of stock repurchase program       $ 500,000,000
Continuous Equity Program CEP V        
Class of Stock [Line Items]        
Issuance of common stock, net of withholdings (in shares) 122,343      
Maximum value of shares of common stock that can be sold $ 1,000,000,000      
Average sales price of common stock (in shares) $ 226.15      
Issuance of common stock, net $ 27,253,000      
Forward contract indexed to issuer's equity (in shares) 68,577      
Forward contract indexed to issuer's equity, net proceeds $ 16,000,000      
Common stock value, remaining to be authorized under continuous equity program $ 705,961,000      
Maximum | Continuous Equity Program CEP V        
Class of Stock [Line Items]        
Percentage of compensation received by sales agent 1.50%      
Restricted stock and restricted stock converted from performance shares        
Class of Stock [Line Items]        
Common stock shares issued in connection with stock grants (in shares) 155,836 165,545 152,502