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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Basic Earnings (Loss) Per Share
Net income (loss) available to common shareholders	$ 30,717	$ 24,803	$ 45,515	$ 46,172
Weighted average number of common shares, outstandind	851,093	786,576	819,245	786,355
Basic earnings (loss) per share	$ 0.04	$ 0.03	$ 0.06	$ 0.06
Diluted Earnings (Loss) Per Share
Net income (loss) available to common shareholders	$ 30,717	$ 24,803	$ 45,515	$ 46,172
Weighted average number of common shares, outstandind	851,093	786,576	819,245	786,355
Potentially dilutive shares from assumed exercise of securities or other contracts to purchase common stock	59,844	123,185	91,641	123,187
Weighted average number of diluted common shares	910,937	909,761	910,886	909,542
Diluted earnings (loss) per share	$ 0.03	$ 0.03	$ 0.05	$ 0.05