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Stock-Based Compensation, Common Stock Repurchases and Dividends Schedule of Repurchase Activity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common stock shares repurchased under board authorized plan	1,569	459	117
Average purchase price per share	$ 6.22	$ 13.15	$ 15.56
Shares available under board authorizations	778

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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