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Stock Based Compensation (Tables)
3 Months Ended
Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Rollforward of Nonvested stock options, deferred stock options, and restricted stock units
Stock Option, Deferred Stock Unit and Restricted Stock Unit awards activity under the Omnibus Equity Incentive Plan for the three months ended March 31, 2019 was as follows:
Stock options
 
Number
of Shares
 
Weighted-
Average
Exercise
Price
Outstanding unvested as of December 31, 2018
968,720

 
15.68

    Granted
157,000

 
13.64

    Forfeited
(24,670
)
 
15.00

Outstanding unvested as of March 31, 2019
1,101,050

 
15.40

Deferred Stock Unit and Restricted Stock Unit awards
 
Number
of Shares
 
Weighted-
Average
Grant Date
Fair Value
Outstanding unvested as of December 31, 2018
27,570

 
12.88

    Granted
182,185

 
13.36

    Vested
(143
)
 
12.79

Outstanding unvested as of March 31, 2019
209,612

 
13.38