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Debt (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Components of long-term debt    
Less current portion $ 5,250 $ 3,000
Noncurrent portion 0 3,000
Sun Trust Term Loan [Member]
   
Components of long-term debt    
SunTrust term loan due quarterly through January 2014 5,250 6,000
Less current portion 5,250 3,000
Noncurrent portion   $ 3,000