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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of Nonvested Restricted Stock Units and Fair Value The following table represents the nonvested restricted stock units and their corresponding fair value (based upon the closing share price) at the date of grant:
 
 
Number of
 
Weighted Average
 
 
Shares
 
Grant Date Fair Value
Nonvested at December 31, 2018
 
424,496

 
$33.60
Granted
 
262,507

 
$33.96
Vested
 
(154,147
)
 
$32.59
Forfeited
 
(79,520
)
 
$31.05
Nonvested at December 31, 2019
 
453,336

 
$34.60
Schedule of Nonvested Performance Share Units and Fair Value The following table represents the nonvested performance share units and their corresponding fair value (based upon the closing share price and/or Monte Carlo simulation) on the date of grant:
 
 
Number of
 
Weighted Average
 
 
Shares
 
Grant Date Fair Value
Nonvested at December 31, 2018
 
263,244

 
$34.51
Granted
 
266,556

 
$34.49
Vested
 
(179,934
)
 
$34.66
Forfeited
 
(156,601
)
 
$35.49
Nonvested at December 31, 2019
 
193,265

 
$33.55