Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Oct. 26, 2009
Stockholders' Equity [Abstract]        
Preferred stock, shares authorized (in shares) 10,000,000      
Preferred stock, par value (in dollars per share) $ 0.001      
Common stock, shares authorized to repurchase (in shares)       4,000,000
Common stock repurchases (in shares) 216,895 141,073    
Common stock repurchases $ 7,809 $ 3,224 $ 6,304