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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of share-based compensation, restricted stock activity
Information with respect to RSUs for the years ended December 31, 2020, 2019 and 2018 are as follows (in thousands):
Restricted SharesAggregate Intrinsic Value
Outstanding, December 31, 20171,236 $26,974 
Vested(292)(5,060)
Granted822 13,016 
Forfeited(268)(4,299)
Outstanding, December 31, 20181,498 30,631 
Vested(314)(6,592)
Granted789 15,630 
Forfeited(207)(4,167)
Outstanding, December 31, 20191,766 35,502 
Vested(462)(8,139)
Granted753 13,760 
Forfeited(83)(1,495)
Outstanding, December 31, 20201,974 $39,628