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Common Stock Repurchases And Dividends (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stockholders Equity Note [Line Items]
Common stock repurchases under Board authorizations	1,000,000		1,000,000
Shares repurchased of the company's common stock	99,616		99,616
Authorized shares available for repurchase	247,393		247,393
Dividend payment to shareholders	$ 1.7	$ 1.0	$ 3.5	$ 1.0
Satisfy Employee Withholding Liabilities [Member]
Stockholders Equity Note [Line Items]
Shares repurchased of the company's common stock			3,296

Equity impact of cash dividends declared by an entity during the period for all classes of stock (common, preferred, etc.). This element includes paid and unpaid dividends declared during the period.

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- Definition

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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