Loans (Narrative) (Details) (USD $)	Jun. 30, 2011		Dec. 31, 2010	Jun. 30, 2010		Dec. 31, 2009
Policy threshold applied to nonaccrual commercial loans	$ 1,000,000
Troubled debt restructurings loans	306,200,000			142,400,000
Allowance for loan losses	524,091,000	[1],[2]	664,799,000	781,269,000	[1],[2]	896,914,000
Permanent Mortgage [Member]
Allowance for loan losses	46,602,000	[1],[2]	65,009,000	77,313,000	[1],[2]	123,897,000
TRUPs [Member]
LOCOM valuation allowance	35,600,000			35,600,000
C&I [Member]
Percentage of commercial loan portfolio	10.00%
Loans Held for Sale [Member]
Troubled debt restructurings loans	70,100,000			34,700,000
Real Estate Residential [Member]
Concentration risk, percentage	45.00%
Consumer Real Estate [Member]
Concentration risk, percentage	34.00%
Allowance for loan losses	162,655,000	[1],[2]	192,350,000	205,752,000	[1],[2]	215,087,000
Bank-Related And TRUP's [Member]
Percentage contributed in total loan	4.00%
Bank-related and trust preferred loans total	700,000,000
Modified Loans Classified As A TDR [Member]
Allowance for loan losses	$ 45,200,000
Allowance For TDRs To Recorded Investment Of TDRs [Member]
Ratio of the allowance for loan losses to loans	15.00%

[1] Q2 2011 and Q2 2010 include $29.9 million and $43.0 million of reserves, respectively, and $649.2 million and $770.3 million of balances in restricted consumer real estate loans, respectively.

[2] Q2 2011 and Q2 2010 include $3.1 million and $7.1 million of reserves, respectively, and $44.9 million and $63.5 million of balances in restricted permanent mortgage loans, respectively.