Loans And Allowance For Loan Losses (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Interest Income Recorded [Member]	Dec. 31, 2012 Interest Income Recorded [Member]	Dec. 31, 2013 Loss And Charged Off [Member]	Dec. 31, 2013 Substandard [Member]	Dec. 31, 2013 Accruing TDRs With Modifications And Renewals Completed [Member]	Dec. 31, 2012 Accruing TDRs With Modifications And Renewals Completed [Member]	Jan. 17, 2014 Subsequent Event [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, net of deferred fees and costs, sold																			$ 88,200,000
Non-accrual loans	416,300,000				543,333,000				416,300,000	543,333,000
Loans and leases receivable, impaired, interest lost on nonaccrual loans									27,700,000	30,200,000
Interest income recognized									21,114,000	22,865,000			5,800,000	7,700,000
Retail loan substandard period (in days)																90 days
Retail loan charge-off period (in days)															120 days
Average recorded investment in impaired loans									952,232,000	1,193,641,000	1,210,000,000
Accrued interest income recognized											18,400,000
Investments income recognized in impairment loans, excluding TDRs									0	0	0
Accruing troubled debt restructuring	556,400,000				673,400,000				556,400,000	673,400,000	668,500,000
Provision for losses on loans	14,064,000	6,761,000	13,077,000	35,696,000	146,526,000	63,572,000	44,222,000	66,049,000	69,598,000	320,369,000	418,795,000						27,700,000	41,400,000
Commercial-type impaired loans												$ 1,000,000