Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Shareholders' Equity [Abstract]

Schedule of Earnings Per Share Reconciliation [Table Text Block]

The reconciliation between basic and diluted earnings per share is presented as follows:

	Years Ended December 31,
	2011		2010		2009
Basic EPS:
Net income	$	119,558	$	102,909	$	82,170
Less: preferred dividend	—		—		6,167
Less: accretion of preferred stock discount	—		—		204
Net income available to common shareholders	$	119,558	$	102,909	$	75,799
Average common shares outstanding	109,102		101,163		84,678
Basic net income per share	$	1.10	$	1.02	$	0.90
Diluted EPS:
Income used in diluted earnings per share calculation	$	119,558	$	102,909	$	75,799
Average common shares outstanding	109,102		101,163		84,678
Add: common stock equivalents:
Stock option plans	—		2		8
Average common and common stock equivalent shares outstanding	109,102		101,165		84,686
Diluted net income per share	$	1.10	$	1.02	$	0.90