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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2017
Share-based Compensation [Abstract]  
Schedule of Nonvested Share Activity
The following table summarizes the restricted stock award, deferred stock award, and performance unit award activity for the period ended June 30, 2017:
 
 
Restricted
Stock
 
Deferred
Stock
 
Performance
Stock Units
 
Weighted Average
Grant Date Fair Value
Outstanding at December 31, 2016
 
79,272

 
—

 
63,690

 
$
21.66

Granted
 
167,404

 
20,175

 
112,208

 
14.06

Vested
 
(21,808
)
 
—

 
—

 
28.08

Adjustment for incentive awards expected to vest
 
—

 
—

 
3,871

 
17.86

Cancelled
 
(31,766
)
 
—

 
(35,274
)
 
14.26

Outstanding at June 30, 2017
 
193,102

 
20,175

 
144,495

 
$
16.37