v3.26.1
Shareholders' Equity (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Feb. 25, 2021
Class of Stock [Line Items]            
Cash dividends received $ 35,100 $ 28,500 $ 46,600 $ 40,600    
Market value of shares repurchased under equity compensation plans     $ 2,604 $ 907    
Equity Compensation Plans            
Class of Stock [Line Items]            
Stock options exercised (in shares) 0 0 0 0    
Equity Compensation Plans | Common Stock            
Class of Stock [Line Items]            
Market value of shares repurchased under equity compensation plans $ 1,800 $ 500 $ 2,600 $ 900    
Equity Compensation Plans | Other Share Based Awards            
Class of Stock [Line Items]            
Company's common stock in lieu of cash to exercise options to purchase shares (in shares) 33,379 11,542 50,641 21,664    
2025 Stock Repurchase Plan            
Class of Stock [Line Items]            
Repurchase of common stock (in shares)           2,000,000.0
Repurchase of common stock (in shares) 0 379,978 447,211 469,632 0  
Repurchase of common stock   $ 15,200 $ 21,600 $ 18,900    
Remaining authorized shares (in shares) 1,553,000   1,553,000