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Equity Transactions (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 16 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Jul. 28, 2011
Equity Transactions (Textual) [Abstract]        
Preferred stock authorized but unissued and undesignated 10,000 10,000 10,000  
Additional amount authorized by board of directors       $ 25,000
Authorized to repurchase common stock including additional repurchase       50,000
Authorized to repurchase common stock 25,000      
Expiration date on repurchase authorizations Sep. 30, 2012   Sep. 30, 2012  
Common stock acquired, shares 1,607   1,657  
Aggregate cost shares of common stock 23,112 782 23,894  
Remaining authorized repurchase amount $ 26,106