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Stockholders' Equity, Restricted Stock Units (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Restricted Stock Units ("RSUs") [Member]
 
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]  
Unrecognized compensation cost related to restricted stock units $ 1,700
Nonvested awards, unrecognized cost, period for recognition 2 years 7 days
Restricted Stock Units ("RSUs") [Member] | Non-employee directors [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Restricted stock units, granted (in shares) 98,363
Weighted average fair market value on grant date - May 23, 2012 (in dollars per share) $ 2.82
Time-based RSUs [Member] | Key executives [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Restricted stock units, granted (in shares) 249,750
Vesting period 3 years
Performance-based RSUs [Member] | Key executives [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Restricted stock units, granted (in shares) 399,750
Vesting period 3 years