Allowance for Loan and Lease Losses Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	$ 105,206		$ 105,206		$ 116,075
Impaired Financing Receivable, Related Allowance	11,814		11,814		13,457
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	92,053		92,053		117,213
Impaired Financing Receivable, Average Investment	208,575	228,453	216,812	235,896
Impaired Financing Receivable, Interest Income, Cash Basis Method	1,134	1,258	2,375	2,138
Residential Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	69,852		69,852		74,189
Impaired Financing Receivable, Related Allowance	7,571		7,571		7,436
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	19,939		19,939		16,738
Impaired Financing Receivable, Average Investment	91,238	82,849	91,134	77,417
Impaired Financing Receivable, Interest Income, Cash Basis Method	654	642	1,314	1,165
Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	8,101		8,101		4,697
Impaired Financing Receivable, Related Allowance	262		262		779
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0		0		9,814
Impaired Financing Receivable, Average Investment	8,480	1,277	10,490	1,312
Impaired Financing Receivable, Interest Income, Cash Basis Method	12	12	35	23
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	27,253		27,253		37,189
Impaired Financing Receivable, Related Allowance	3,981		3,981		5,242
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	72,114		72,114		90,661
Impaired Financing Receivable, Average Investment	108,857	144,327	115,188	157,167
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 468	$ 604	$ 1,026	$ 950