Loans (Non-accrual Loans, Loans Past Due 90 Days And Other Real Estate Owned And Delinquent Loans By Loan Category) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-accrual loans	$ 48,750		$ 25,190		$ 26,454
Loans past due 90 days or more	204		4,435		3,861
Total non-performing loans	1,984,588		1,897,191
Other real estate owned	20,111		4,241		3,065
Total non-performing assets	69,065		33,866		33,380
Nonperforming Financing Receivable [Member]
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-performing loans	48,954		29,625		30,315
Construction [Member]
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-accrual loans	8,142		4,538		8,886
Total non-performing loans	255,272		258,684
Commercial Mortgage [Member]
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-accrual loans	7,580		9,175		8,894
Total non-performing loans	654,456	[1]	617,069	[1]
Commercial [Member]
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-accrual loans	29,755		10,459		7,654
Total non-performing loans	470,072		470,109
Consumer Loan [Member]
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-accrual loans	1,257		927		927
Residential Mortgage [Member]
Financing Receivables Past Due and Other Real Estate Owned [Line Items]
Total non-accrual loans	2,016		91		93
Total non-performing loans	$ 94,564		$ 97,717

[1] At September 30, 2013, our owner-occupied loans amounted to $181.2 million, or 27.7% of commercial mortgages compared to $172.5 million, or 28.0% at December 31, 2012.