v3.26.1
Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance $ 306,611 $ 305,361 $ 307,929 $ 307,561
Net income 5,306 2,689 9,567 6,467
Class A conversion   0   0
Acquisition of treasury stock (14,578)   (16,568) (2,000)
Restricted stock issuances (1,307) (999) (1,984) (1,884)
Amortization of restricted stock 2,118 1,906 4,493 3,986
Directors' Compensation Plan 1,242 1,094 1,264 1,094
Ending balance 294,072 304,871 294,072 304,871
Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Common Stock/Class A Common Stock, Dividends declared $ (4,945) $ (4,807) $ (9,878) $ (9,606)
Cash dividends per share (in dollars per share) $ 0.33 $ 0.32 $ 0.66 $ 0.64
Class A Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Common Stock/Class A Common Stock, Dividends declared $ (375) $ (373) $ (751) $ (747)
Cash dividends per share (in dollars per share) $ 0.31 $ 0.30 $ 0.62 $ 0.60
Common Stock | Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance $ 30,674 $ 30,498 $ 30,633 $ 30,419
Class A conversion   35   61
Restricted stock issuances 113 100 154 153
Ending balance 30,787 30,633 30,787 30,633
Common Stock | Class A Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 1,732 1,767 1,732 1,793
Class A conversion   (35)   (61)
Ending balance 1,732 1,732 1,732 1,732
Additional Paid-In Capital        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 125,037 118,399 123,373 117,257
Restricted stock issuances (1,420) (1,099) (2,138) (2,037)
Amortization of restricted stock 2,118 1,906 4,493 3,986
Directors' Compensation Plan 943 868 950 868
Ending balance 126,678 120,074 126,678 120,074
Retained Earnings        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 416,805 417,565 417,853 418,960
Net income 5,306 2,689 9,567 6,467
Ending balance 416,791 415,074 416,791 415,074
Retained Earnings | Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Common Stock/Class A Common Stock, Dividends declared (4,945) (4,807) (9,878) (9,606)
Retained Earnings | Class A Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Common Stock/Class A Common Stock, Dividends declared (375) (373) (751) (747)
Accumulated Other Comprehensive Loss        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (1,111) (869) (1,111) (869)
Ending balance (1,111) (869) (1,111) (869)
Treasury Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (266,526) (261,999) (264,551) (259,999)
Acquisition of treasury stock (14,578)   (16,568) (2,000)
Directors' Compensation Plan 299 226 314 226
Ending balance $ (280,805) $ (261,773) $ (280,805) $ (261,773)