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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Basic Earnings (Loss) Per Share
Net income available to common shareholders	$ 44,229	$ 37,188	$ 134,399	$ 82,704
Weighted average common shares outstanding	139,043	136,671	138,989	123,652
Basic net income per common share	$ 0.32	$ 0.27	$ 0.97	$ 0.67
Diluted Earnings (Loss) Per Share
Net income available to common shareholders	$ 44,229	$ 37,188	$ 134,399	$ 82,704
Weighted average common shares outstanding	139,043	136,671	138,989	123,652
Potentially dilutive shares from assumed exercise of securities or other contracts to purchase Common Stock	683	426	611	8,823
Weighted average number of diluted common shares	139,726	137,097	139,600	132,476
Diluted net income per common share	$ 0.32	$ 0.27	$ 0.96	$ 0.62