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STOCK INCENTIVE PLANS (Tables)
 9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Issuance of Restricted Stock Awards and Aggregate Weighted Average Grant Date Fair Values
The following table details our issuance of restricted stock awards and the aggregate weighted average grant date fair values under these plans for the years indicated. As of September 30, 2017, we had available up to 2,654,901 shares of common stock to issue under this Plan.
 
Nine Months Ended
September 30,
(dollars in thousands)
2017
 
2016
Restricted stock awards
713,998

 
574,125

Weighted average grant date fair values
$
10,474

 
$
7,383
Summary of Activity Relating to Restricted Stock Awards
The following table summarizes the activity relating to restricted stock awards during the periods indicated:

 
Nine Months Ended September 30,
 
2017
 
2016
 
Awards
 
Weighted
Average
Grant
Price per
Share
 
Awards
 
Weighted
Average
Grant
Price per
Share
Unvested awards outstanding at beginning of period
1,836,363

 
$
12.97

 
1,548,444

 
$
12.85

Granted
713,998

 
14.67

 
574,125

 
12.86

Vested
(594,560
)
 
12.84

 
(374,579
)
 
12.11

Forfeited/expired
(27,109
)
 
13.94

 
(21,486
)
 
12.98

Dividend reinvestment
46,969

 
13.79

 
44,534

 
12.25

Unvested awards outstanding at end of period
1,975,661

 
13.63

 
1,771,038

 
13.00
Schedule of Certain Information Related to Restricted Stock Awards
The following table provides certain information related to restricted stock awards:

(in thousands)
Nine Months Ended
September 30,
 
2017
 
2016
Stock-based compensation expense
$
6,088

 
$
4,644

Tax benefit related to stock-based compensation expense
2,131

 
1,625

Fair value of awards vested
8,046

 
4,563
Components of Restricted Stock Awards
The components of the restricted stock awards as of September 30, 2017 are as follows:

(dollars in thousands)
Service-
Based
Awards
 
Performance-
Based
Awards
 
Total
Unvested restricted stock awards
1,070,545

 
905,116

 
1,975,661

Unrecognized compensation expense
$
8,258

 
$
6,009

 
$
14,267

Intrinsic value
$
15,020

 
$
12,699

 
$
27,719

Weighted average remaining life (in years)
2.21

 
1.96

 
2.10
Summary of Activity Relating to Stock Options Awards
The following table summarizes the activity relating to stock options during the periods indicated:
 
 
Nine Months Ended September 30,
 
2017
 
2016
 
Shares
 
Weighted
Average
Exercise
Price
 
Shares
 
Weighted
Average
Exercise
Price
Options outstanding at beginning of period
892,532

 
$
8.95

 
435,340

 
$
8.86

Assumed from acquisitions
207,645

 
8.92

 
1,707,036

 
7.83

Exercised
(163,455
)
 
9.41

 
(352,094
)
 
6.89

Forfeited/expired
(56,687
)
 
11.16

 
(93,628
)
 
6.74

Options outstanding and exercisable at end of period
880,035

 
8.72

 
1,696,654

 
8.35