Consolidated Statements of Changes in Shareholders' Equity (parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common Stock, Dividends, Per Share, Cash Paid	$ 0.64	$ 0.64	$ 0.64
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	48,365
Stock Issued During Period, Shares, Restricted Stock Award, Gross	596,415	587,113	451,205
Treasury Stock, Shares, Acquired	198,407	152,818	174,793
Stock Issued During Period, Shares, Treasury Stock Reissued	105,850	19,154	8,779
Stock Issued During Period, Shares, New Issues	0	0	21,487,860