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STOCK INCENTIVE PLANS (Tables)
 6 Months Ended
Jun. 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 June 30, 2017, we had available up to 2,657,259 shares of common stock to issue under this Plan.
 
Six Months Ended June 30,
(dollars in thousands)
2017
 
2016
Restricted stock awards
707,851

 
571,322

Weighted average grant date fair values
$
10,398

 
$
7,347
Summary of Activity Relating to Restricted Stock Awards
The following table summarizes the activity relating to restricted stock awards during the periods indicated:

 
Six Months Ended June 30,
 
2017
 
2016
 
Awards
 
Weighted
Average
Grant
Price
 
Awards
 
Weighted
Average
Grant
Price
Unvested awards outstanding at beginning of period
1,836,363

 
$
12.97

 
1,548,444

 
$
12.85

Granted
707,851

 
14.69

 
571,322

 
12.86

Vested
(592,202
)
 
12.84

 
(372,928
)
 
12.10

Forfeited/expired
(14,679
)
 
13.23

 
(20,230
)
 
12.97

Dividend reinvestment
28,454

 
14.49

 
27,210

 
12.30

Unvested awards outstanding at end of period
1,965,787

 
13.65

 
1,753,818

 
13.01
Schedule of Certain Information Related to Restricted Stock Awards
The following table provides certain information related to restricted stock awards:

(in thousands)
Six Months Ended
June 30,
 
2017
 
2016
Stock-based compensation expense
$
3,958

 
$
2,916

Tax benefit related to stock-based compensation expense
1,385

 
1,021

Fair value of awards vested
8,013

 
4,542
Components of Restricted Stock Awards
The components of the restricted stock awards as of June 30, 2017 are as follows:

(dollars in thousands)
Service-
Based
Awards
 
Performance-
Based
Awards
 
Total
Unvested restricted stock awards
1,069,132

 
896,655

 
1,965,787

Unrecognized compensation expense
$
9,541

 
$
6,957

 
$
16,498

Intrinsic value
$
15,139

 
$
12,697

 
$
27,836

Weighted average remaining life (in years)
2.41

 
2.17

 
2.30
Summary of Activity Relating to Stock Options Awards
The following table summarizes the activity relating to stock options during the periods indicated:
 
 
Six Months Ended June 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
(155,597
)
 
9.43

 
(287,787
)
 
7.11

Forfeited/expired
(56,510
)
 
11.17

 
(93,391
)
 
6.73

Options outstanding and exercisable at end of period
888,070

 
8.72

 
1,761,198

 
8.26