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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Share Capital
Share Capital
Class A Stock
Contributed Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   $ 46,557   $ 47,406 $ 496,998 $ 1,761
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of Class A non-voting common stock     $ 6,183      
Repurchase of Class A non-voting common stock for cancellation     (8,434)      
Net Income (Loss) Attributable to Parent $ 7,818       7,818  
Share-based expense       2,062    
Vested employee share plan awards       (11,523)    
Dividends paid         $ (1,561)  
Currency translation adjustment (537)         (537)
Dividends paid per share         $ 0.12  
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 586,730 44,306   37,945 $ 503,255 1,224
Stockholders' Equity Attributable to Parent 685,668          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   39,333   41,481 601,406 3,448
Issuance of Class A non-voting common stock     3,808      
Repurchase of Class A non-voting common stock for cancellation     $ 0      
Net Income (Loss) Attributable to Parent 38,658          
Share-based expense       2,460    
Vested employee share plan awards       (8,512)    
Dividends paid         $ (1,506)  
Currency translation adjustment (836)         (836)
Dividends paid per share         $ 0.12  
Stockholders' Equity Attributable to Parent 719,740          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 719,740 $ 43,141   $ 35,429 $ 638,558 $ 2,612