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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of RSU Activity
The following table summarizes the nonvested restricted stock units as of December 31, 2013 and 2012:
 
 
Number of Restricted Stock Units
 
Weighted Average Grant Date Fair Value
 
Weighted Average Remaining Contractual
Term
(Years)
Nonvested as of December 31, 2011
 
75,922

 
$
14.02

 
3.2
Granted
 
87,414

 
18.02

 
 
Vested
 
(18,971
)
 
14.02

 
 
Forfeitures
 
(2,117
)
 
18.02

 
 
Nonvested as of December 31, 2012
 
142,248

 
$
16.42

 
2.8
Granted
 
202,523

 
24.19

 
 
Vested
 
(43,571
)
 
16.41

 
 
Forfeitures
 
(21,729
)
 
20.19

 
 
Nonvested as of December 31, 2013
 
279,471

 
$
21.76

 
2.8
Schedule of Option Activity
A summary of the option activity under the equity plans for the years ended December 31, 2013 and 2012, respectively, is as follows: 
 
Shares
 
Weighted
Average
Exercise
Price
 
Weighted Average Remaining Contractual
Term
(Years)
 
Aggregate
Intrinsic
Value
 
 
 
 
 
 
 
(In thousands)
Outstanding as of December 31, 2011
1,811,536

 
$
11.41

 
4.8
 
$
4,927

Granted
—

 
—

 
 
 
 
Exercised
(226,068
)
 
9.59

 
 
 
 
Forfeited
—

 
—

 
 
 
 
Outstanding as of December 31, 2012
1,585,468

 
$
11.67

 
3.8
 
$
10,258

Granted
—

 
—

 
 
 
 
Exercised
(729,651
)
 
9.33

 
 
 
 
Forfeited
—

 
—

 
 
 
 
Outstanding as of December 31, 2013
855,817

 
$
13.67

 
3.0
 
$
11,365