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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 |  |  |

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