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CONSOLIDATED STATEMENTS STOCKHOLDERS EQUITY - USD ($)
$ in Thousands
Total
Class A and B Common Stock [Member]
Additional Paid-in Capital [Member]
Purchase Price in Excess Of Predecessor Basis, Net Of Tax [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Treasury Stock [Member]
Beginning Balance at Dec. 31, 2019 $ 1,075,279 $ 419 $ 179,637 $ (15,458) $ 1,179,601 $ (186) $ (268,734)
Beginning Balance (in shares) at Dec. 31, 2019   41,887,088         (7,870,888)
Stock withheld for payments of withholding taxes (4,041)           $ (4,041)
Stock withheld for payments of withholding taxes (in shares)             (77,491)
Issuance of restricted stock awards, net of forfeitures     (9,173)       $ 9,173
Issuance of restricted stock awards, net of forfeitures (in shares)             218,248
Share-based compensation expense 12,676   12,676        
Net income 51,171       51,171    
Foreign currency translation adjustment (74)         (74)  
Ending Balance at Sep. 30, 2020 1,135,011 $ 419 183,140 (15,458) 1,230,772 (260) $ (263,602)
Ending Balance (in shares) at Sep. 30, 2020   41,887,088         (7,730,131)
Beginning Balance at Jun. 30, 2020 1,105,837 $ 419 178,914 (15,458) 1,205,991 (283) $ (263,746)
Beginning Balance (in shares) at Jun. 30, 2020   41,887,088         (7,706,638)
Stock withheld for payments of withholding taxes (97)           $ (97)
Stock withheld for payments of withholding taxes (in shares)             (1,896)
Issuance of restricted stock awards, net of forfeitures     (241)       $ 241
Issuance of restricted stock awards, net of forfeitures (in shares)             (21,597)
Share-based compensation expense 4,467   4,467        
Net income 24,781       24,781    
Foreign currency translation adjustment 23         23  
Ending Balance at Sep. 30, 2020 1,135,011 $ 419 183,140 (15,458) 1,230,772 (260) $ (263,602)
Ending Balance (in shares) at Sep. 30, 2020   41,887,088         (7,730,131)
Beginning Balance at Dec. 31, 2020 1,157,923 $ 419 186,058 (15,458) 1,253,160 (191) $ (266,065)
Beginning Balance (in shares) at Dec. 31, 2020   41,887,088         (7,675,084)
Stock withheld for payments of withholding taxes (4,038)           $ (4,038)
Stock withheld for payments of withholding taxes (in shares)             (70,176)
Issuance of restricted stock awards, net of forfeitures     (8,383)       $ 8,383
Issuance of restricted stock awards, net of forfeitures (in shares)             206,185
Share-based compensation expense 14,090   14,090        
Net income 87,160       87,160    
Foreign currency translation adjustment (10)         (10)  
Ending Balance at Sep. 30, 2021 1,255,125 $ 419 191,765 (15,458) 1,340,320 (201) $ (261,720)
Ending Balance (in shares) at Sep. 30, 2021   41,887,088         (7,539,075)
Beginning Balance at Jun. 30, 2021 1,207,076 $ 419 186,210 (15,458) 1,296,982 (176) $ (260,901)
Beginning Balance (in shares) at Jun. 30, 2021   41,887,088         (7,519,741)
Stock withheld for payments of withholding taxes (65)           $ (65)
Stock withheld for payments of withholding taxes (in shares)             (968)
Issuance of restricted stock awards, net of forfeitures     754       $ (754)
Issuance of restricted stock awards, net of forfeitures (in shares)             (18,366)
Share-based compensation expense 4,801   4,801        
Net income 43,338       43,338    
Foreign currency translation adjustment (25)         (25)  
Ending Balance at Sep. 30, 2021 $ 1,255,125 $ 419 $ 191,765 $ (15,458) $ 1,340,320 $ (201) $ (261,720)
Ending Balance (in shares) at Sep. 30, 2021   41,887,088         (7,539,075)