Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

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:

	Three Months Ended
	March 31, 2013		March 31, 2012
Basic EPS:
Net income	$	37,346	$	30,344
Less:
Cash dividends on 5.875% non-cumulative perpetual series A, preferred stock	930		—
Income allocated to participating securities	291		137
Net income attributable to common shareholders	$	36,125	$	30,207
Average common shares outstanding	110,807		110,041
Less: participating shares included in average shares outstanding	1,118		830
Average common shares outstanding used in basic EPS	109,689		109,211
Basic net income per share	$	0.33	$	0.28
Diluted EPS:
Income used in diluted earnings per share calculation	$	36,125	$	30,207
Average common shares outstanding	110,807		110,041
Add: common stock equivalents:
Stock option plans	—		—
Less: participating shares included in average shares outstanding	1,118		830
Average common and common stock equivalent shares outstanding	109,689		109,211
Diluted net income per share	$	0.33	$	0.28