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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Changes in Stockholders' Equity [Abstract]
Cash dividends - per share (in dollars per share)	$ 0.80	$ 0.80	$ 0.80
Purchase of Treasury Shares (in shares)	1,458,609	23,810	0
Net issuance of common shares (in shares)	0	0	1,576,230
Net issuance of shares to employee stock plans, including tax benefit (in shares)	112,512	141,146	203,480

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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