Net Income Per Common Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Basic Earnings (Loss) Per Share
Net income available to common shareholders	$ 44,313	$ 30,717	$ 90,170	$ 45,515
Weighted average common shares outstanding	138,991	121,585	138,961	117,035
Basic net income per common share	$ 0.32	$ 0.25	$ 0.65	$ 0.39
Diluted Earnings (Loss) Per Share
Net income available to common shareholders	$ 44,313	$ 30,717	$ 90,170	$ 45,515
Weighted average common shares outstanding	138,991	121,585	138,961	117,035
Potentially dilutive shares from assumed exercise of securities or other contracts to purchase Common Stock	576	8,549	574	13,092
Weighted average number of diluted common shares	139,567	130,134	139,535	130,127
Diluted net income per common share	$ 0.32	$ 0.24	$ 0.65	$ 0.35