Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Statement of Stockholders' Equity [Abstract]
Cash dividends - common stock	$ 1	$ 0.64	$ 0.77
Options exercised	0	48,365	156,445
Nonvested (restricted) shares granted	587,113	451,205	554,258
Restricted Stock Activity	152,818	174,793	153,823
Deferred Compensation Trust	19,154	8,779	22,730
Issuance of common stock	0	21,487,860	3,267,751