Other Non-Interest Income And Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Non-Interest Income And Expense [Abstract]
Components of total net interest income and expense, exceeding percentage	1.00%
Check card income	$ 19,811	$ 21,116	$ 18,536
Gain on termination of interest rate swap			17,722
Other	26,751	29,220	28,171
Total	46,562	50,336	64,429
Legal and other professional fees	19,802	20,792	19,858
Advertising, promotions and public relations	22,584	15,087	15,327
Other	95,207	88,328	90,426
Total	$ 137,593	$ 124,207	$ 125,611