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Stock Compensation and Other Benefit Plans for ROIC (Tables)
12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Restricted Stock Units Activity
 
Shares
 
Weighted Average
Grant Date Fair Value
Non-vested as of December 31, 2017
781,467

 
$
18.14

Granted
514,972

 
$
15.85

Vested
(274,608
)
 
$
18.46

Forfeited
(18,996
)
 
$
17.75

Non-vested as of December 31, 2018
1,002,835

 
$
16.88