Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Detail)

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Subsequent Events (Detail) - USD ($)
$ / shares in Units, $ in Millions
2 Months Ended 12 Months Ended
Feb. 27, 2023
Feb. 23, 2023
Dec. 31, 2022
Apr. 06, 2023
Subsequent Event [Line Items]        
Dividends payable     $ 2.2  
Shares repurchased and retired (in shares)     864,271  
Value of shares repurchased and retired     $ 29.6  
Forecast        
Subsequent Event [Line Items]        
Dividends payable       $ 10.4
Subsequent Event        
Subsequent Event [Line Items]        
Shares repurchased and retired (in shares)   11,850    
Value of shares repurchased and retired   $ 0.4    
Unvested Restricted Stock and Deferred Stock Units | 2013 Plan | Forecast        
Subsequent Event [Line Items]        
Dividends payable       $ 0.5
Semi Annual Regular Dividend | Forecast        
Subsequent Event [Line Items]        
Dividends payable (in dollars per share)       $ 0.25
Mortgage Brokerage Business | Subsequent Event        
Subsequent Event [Line Items]        
Total consideration for business acquisitions and other commitments $ 15.3      
Payments for business acquisitions and other commitments $ 9.3