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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Stock Appreciation Rights (SARs) [Member]
Common Stock [Member]
Stock Appreciation Rights (SARs) [Member]
Additional Paid-in Capital [Member]
Stock Appreciation Rights (SARs) [Member]
Retained Earnings [Member]
Stock Appreciation Rights (SARs) [Member]
AOCI Attributable to Parent [Member]
Stock Appreciation Rights (SARs) [Member]
Restricted Stock [Member]
Common Stock [Member]
Restricted Stock [Member]
Additional Paid-in Capital [Member]
Restricted Stock [Member]
Retained Earnings [Member]
Restricted Stock [Member]
AOCI Attributable to Parent [Member]
Restricted Stock [Member]
Performance Shares [Member]
Common Stock [Member]
Performance Shares [Member]
Additional Paid-in Capital [Member]
Performance Shares [Member]
Retained Earnings [Member]
Performance Shares [Member]
AOCI Attributable to Parent [Member]
Performance Shares [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2018                               15,202,387        
Balance at Dec. 31, 2018                               $ 15 $ 55,859 $ 103,032 $ (7,985) $ 150,921
Common shares issued upon exercise of options (in shares)                               62,994        
Common shares issued upon exercise of options                                 460 (177)   283
Restricted shares issued (in shares)                               69,530        
Restricted shares issued                                       0
Share-based compensation expense                                 1,484     1,484
Tax benefit from vesting of acquisition-related restricted stock                               30 30
Cash dividends declared                                   (6,046)   $ (6,046)
Common stock reacquired and retired (in shares)                               (107,307)       (49,091)
Common stock reacquired and retired                               (391) (1,294) $ (1,685)
Net earnings                                   12,066   12,066
Cash flow hedges, net of taxes                                     (22) (22)
Pensions, net of taxes                                     449 449
Change in currency translation adjustment, net of taxes                                     74 74
Balance (in shares) at Dec. 31, 2019                               15,227,604        
Balance at Dec. 31, 2019                               $ 15 57,442 107,581 (7,484) 157,554
Common shares issued upon exercise of options (in shares)                               157,730        
Common shares issued upon exercise of options                               2,110 (183) 1,927
Restricted shares issued (in shares)                               49,784        
Restricted shares issued                               0
Share-based compensation expense                                 2,530     2,530
Tax benefit from vesting of acquisition-related restricted stock                               (13) (13)
Cash dividends declared                                   (6,111)   $ (6,111)
Common stock reacquired and retired (in shares)                               (43,458)       (43,458)
Common stock reacquired and retired                               (159) (341) $ (500)
Net earnings                                   41,026   41,026
Cash flow hedges, net of taxes                                     (22) (22)
Pensions, net of taxes                                     (3,674) (3,674)
Change in currency translation adjustment, net of taxes                                     (1,021) $ (1,021)
Tax withheld on exercise of share-based compensation   $ (66)     $ (66)                              
Balance (in shares) at Dec. 31, 2020                               15,391,660       15,391,660
Balance at Dec. 31, 2020                               $ 15 61,844 141,972 (12,201) $ 191,630
Common shares issued upon exercise of options (in shares)                                       305,018
Restricted shares issued (in shares)                               338,852        
Restricted shares issued                               $ 0
Share-based compensation expense                               4,010 4,010
Tax benefit from vesting of acquisition-related restricted stock                               171 171
Cash dividends declared                               (7,237) $ (7,237)
Common stock reacquired and retired (in shares)                                       0
Net earnings                               29,440 $ 29,440
Cash flow hedges, net of taxes                               (23) (23)
Pensions, net of taxes                               6,321 6,321
Change in currency translation adjustment, net of taxes                               (310) (310)
Tax withheld on exercise of share-based compensation $ (179) $ (179)           $ (405) $ (405)          
Common shares issued upon exercise of options and SARs, net (in shares)                               308,550        
Common shares issued upon exercise of options and SARs, net                                 3,041 (339)   2,703
Performance based shares issued (in shares)                               42,823        
Performance based shares issued                               $ 0
Restricted shares issued in conjunction with acquisition of business (in shares)           45,620                            
Restricted shares issued in conjunction with acquisition of business           $ 869 $ 869                    
Balance (in shares) at Dec. 31, 2021                               16,127,505       16,127,505
Balance at Dec. 31, 2021                               $ 16 $ 69,351 $ 163,836 $ (6,213) $ 226,990