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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2013
Stockholders' Equity Note [Abstract]  
Summary of Assumptions Used in Calculating Fair Value of Option Awards
A summary of the assumptions used in calculating the fair value of option awards during the years ended December 31, 2011 are as follows: 
 
 
Year Ended December 31,
 
 
2011
Expected life in years
 
4

Risk-free interest rate
 
1.5
%
Dividends rate
 
None

Fair value per optional share
 
$
3.94

Volatility
 
72
%
Summary of Option Activity under Incentive Plan
A summary of option activity under the Incentive Plan is presented below: 
 
 
December 31, 2013
 
 
Shares
 
Weighted Average Exercise Price (per share)
 
Weighted Average Remaining Contractual Term (in years)
 
Aggregate
Intrinsic
Value
 
 
(in thousands, except exercise price and contractual terms)
Outstanding options, beginning of period
 
1,672

 
$
16.44

 
 
 
 
Granted
 

 

 
 
 
 
Exercised
 
(440
)
 
10.43

 
 
 
 
Forfeited or expired
 
(231
)
 
32.03

 
 
 
 
Outstanding options, end of period
 
1,001

 
$
15.49

 
1.3
 
$
9,928

Options exercisable, end of period
 
991

 
$
15.57

 
1.2
 
$
9,758

Options expected to vest, end of period
 
9

 
$
6.46

 
3.7
 
$
479

Summary of Unvested Shares of Restricted Stock and Changes
A summary of the status of the Company’s unvested shares of restricted stock and changes during the years then ended is presented below: 
 
 
December 31,
 
 
2013
 
2012
 
 
Shares
 
Weighted Average Grant Date Fair Value
 
Shares
 
Weighted Average Grant Date Fair Value
 
 
(in thousands, except per share amounts)
Balance, beginning of period
 
1,470

 
$
7.32

 
1,303

 
$
6.44

Granted
 
538

 
12.52

 
721

 
8.16

Vested
 
(524
)
 
6.42

 
(455
)
 
6.10

Forfeited
 
(280
)
 
8.85

 
(99
)
 
7.35

Balance, end of period
 
1,204

 
$
9.71

 
1,470

 
$
7.32