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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of share-based compensation expense
The following table summarizes share-based compensation expense:
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
(in thousands)
2014
 
2013
 
2014
 
2013
Restricted stock
$
653

 
$
802

 
$
2,066

 
$
2,522

Performance unit incentive plan (“PUP”)
(600
)
 
347

 
(505
)
 
871

Restricted stock units
6

 
3

 
1

 
104

Stock options
—

 
50

 
—

 
72

Share-based compensation before income tax benefit
59

 
1,202

 
1,562

 
3,569

Income tax benefit
(17
)
 
(445
)
 
(587
)
 
(1,326
)
Share-based compensation, net of income tax benefit
$
42

 
$
757

 
$
975

 
$
2,243
Summary of Liability Based Award Activity
The following table summarizes the activity of the outstanding share-based compensation awards:
 
Restricted Stock
 
PUP Awards
 
Restricted Stock Units
 
Shares
 
Weighted-Average
Grant Date
Fair Value
 
Units
 
Weighted-Average
Grant Date
Fair Value
 
Units
 
Weighted-Average
Grant Date
Fair Value
Balance, December 31, 2013
430,899

 
$
22.78

 
299,768

 
$
23.46

 
28,560

 
$
22.91

Granted
89,800

 
23.81

 
123,300

 
23.71

 
6,700

 
24.95

Vested
(137,187
)
 
22.59

 
(94,600
)
 
23.01

 
(9,890
)
 
23.45

Forfeited
(17,840
)
 
22.13

 
(7,800
)
 
24.93

 
(500
)
 
27.32

Balance, September 30, 2014
365,672

 
23.14

 
320,668

 
23.66

 
24,870

 
23.16
Summary of stock option activity
The following table summarizes stock option activity:
 
Shares
 
Weighted-
Average
Exercise Price
 
Options
Exercisable
Options outstanding at December 31, 2013
314,323

 
$
19.79

 
314,323

Exercised
(66,076
)
 
18.53

 
 
Forfeited or expired
(18,522
)
 
35.28

 
 
Award modification
17,865

 
N/A

 
 
Options outstanding at September 30, 2014
247,590

 
$
17.82

 
247,590