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Consolidated Statements Of Stockholders' Equity And Non Controlling Interests (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements Of Stockholders' Equity [Abstract]
Dividends declared per share	$ 0.92	$ 0.92	$ 0.92
Number of shares issued		105,750
Issuance of shares market value per share over par		$ 23.50

The number of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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