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Stock-based Compensation Plan (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Changes in shares granted for stock options
Changes in shares granted for stock options for the year ended December 31, 2015 are summarized as follows:
 
Options
 
Weighted-
Average
Exercise Price
Outstanding at December 31, 2014
1,000

 
$
16.73

Exercised
(1,000
)
 
16.73

Forfeited or expired
—

 
—

Outstanding at December 31, 2015
—

 
—

Exercisable at December 31, 2015
—

 
—
Activity for restricted stock awards
The following table summarizes the restricted stock award activity for the year ended December 31, 2015:
 
Restricted Stock
 
Weighted-
Average
Grant Date Fair Value
Non-vested at December 31, 2014
162,053

 
$
22.04

Granted
133,414

 
25.35

Vested
(81,294
)
 
21.66

Forfeited
(8,184
)
 
24.36

Non-vested at December 31, 2015
205,989

 
24.24