v3.26.1
Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance $ 307,929 $ 307,561
Net income 4,261 3,778
Class A conversion   0
Acquisition of treasury stock (1,990) (2,000)
Restricted stock issuances (677) (885)
Amortization of restricted stock 2,376 2,080
Directors' Compensation Plan 21  
Ending balance 306,611 305,361
Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Common Stock/Class A Common Stock, Dividends declared $ (4,934) $ (4,799)
Cash dividends per share (in dollars per share) $ 0.33 $ 0.32
Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Common Stock/Class A Common Stock, Dividends declared $ (375) $ (374)
Cash dividends per share (in dollars per share) $ 0.31 $ 0.30
Common Stock | Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance $ 30,633 $ 30,419
Class A conversion   26
Restricted stock issuances 41 53
Ending balance 30,674 30,498
Common Stock | Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 1,732 1,793
Class A conversion   (26)
Ending balance 1,732 1,767
Additional Paid-In Capital    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 123,373 117,257
Restricted stock issuances (718) (938)
Amortization of restricted stock 2,376 2,080
Directors' Compensation Plan 6  
Ending balance 125,037 118,399
Retained Earnings    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 417,853 418,960
Net income 4,261 3,778
Ending balance 416,805 417,565
Retained Earnings | Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Common Stock/Class A Common Stock, Dividends declared (4,934) (4,799)
Retained Earnings | Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Common Stock/Class A Common Stock, Dividends declared (375) (374)
Accumulated Other Comprehensive Loss    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (1,111) (869)
Ending balance (1,111) (869)
Treasury Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (264,551) (259,999)
Acquisition of treasury stock (1,990) (2,000)
Directors' Compensation Plan 15  
Ending balance $ (266,526) $ (261,999)