Loans And Allowance For Loan Losses (Activity In The Allowance For Losses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Balance at January 1	$ 197,538	$ 194,480	$ 172,619
Provision for loan losses	51,515	100,000	160,697
Loans charged off	81,385	114,573	154,410
Less recoveries	16,864	17,631	15,574
Net loans charged off	64,521	96,942	138,836
Balance at December 31	184,532	197,538	194,480
Commercial [Member]
Balance at January 1	119,946
Provision for loan losses	18,052
Loans charged off	18,818
Less recoveries	3,317
Net loans charged off	15,501
Balance at December 31	122,497
Personal Banking [Member]
Balance at January 1	77,592
Provision for loan losses	33,463
Loans charged off	62,567
Less recoveries	13,547
Net loans charged off	49,020
Balance at December 31	$ 62,035