Loans and Leases and Allowance for Credit Losses (Details 3) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011		Sep. 30, 2011		Dec. 31, 2010
With an allowance recorded [Member] | Commercial and Industrial [Member]
Detailed impaired loan information by class
Ending Balance	$ 148,052	[1]	$ 148,052	[1]	$ 173,243
Unpaid Principal Balance	197,676		197,676		239,703
Related Allowance	31,249		31,249		63,308
Average Balance	151,547		156,376
Interest Income Recognized	1,445		3,608
With an allowance recorded [Member] | Commercial Real Estate [Member]
Detailed impaired loan information by class
Ending Balance	310,047	[2]	310,047	[2]	241,256
Unpaid Principal Balance	410,417		410,417		339,264
Related Allowance	61,472		61,472		65,129
Average Balance	310,002		283,893
Interest Income Recognized	2,085		4,895
With an allowance recorded [Member] | Residential Mortgage [Member]
Detailed impaired loan information by class
Ending Balance	325,242		325,242		334,207
Unpaid Principal Balance	347,843		347,843		347,571
Related Allowance	14,757		14,757		11,780
Average Balance	329,685		335,400
Interest Income Recognized	3,038		9,848
With an allowance recorded [Member] | Commercial and industrial owner occupied [Member]
Detailed impaired loan information by class
Ending Balance	40,311		40,311		63,951
Unpaid Principal Balance	58,925		58,925		85,279
Related Allowance	5,891		5,891		14,322
Average Balance	49,354		56,747
Interest Income Recognized	499		1,362
With an allowance recorded [Member] | Other commercial and industrial [Member]
Detailed impaired loan information by class
Ending Balance	107,741		107,741		109,292
Unpaid Principal Balance	138,751		138,751		154,424
Related Allowance	25,358		25,358		48,986
Average Balance	102,193		99,629
Interest Income Recognized	946		2,246
With an allowance recorded [Member] | Commercial real estate retail properties [Member]
Detailed impaired loan information by class
Ending Balance	118,010		118,010		74,732
Unpaid Principal Balance	146,923		146,923		120,051
Related Allowance	29,030		29,030		14,846
Average Balance	99,018		96,231
Interest Income Recognized	863		1,975
With an allowance recorded [Member] | Commercial real estate Multi family [Member]
Detailed impaired loan information by class
Ending Balance	22,365		22,365		38,758
Unpaid Principal Balance	29,085		29,085		39,299
Related Allowance	4,170		4,170		7,760
Average Balance	23,943		29,348
Interest Income Recognized	130		625
With an allowance recorded [Member] | Commercial real estate office [Member]
Detailed impaired loan information by class
Ending Balance	24,863		24,863		26,595
Unpaid Principal Balance	41,496		41,496		31,261
Related Allowance	3,490		3,490		9,466
Average Balance	25,061		27,716
Interest Income Recognized	53		197
With an allowance recorded [Member] | Commercial real estate Industrial and warehouse [Member]
Detailed impaired loan information by class
Ending Balance	50,423		50,423		34,588
Unpaid Principal Balance	61,563		61,563		44,168
Related Allowance	7,141		7,141		10,453
Average Balance	54,345		44,649
Interest Income Recognized	166		588
With an allowance recorded [Member] | Other commercial real estate [Member]
Detailed impaired loan information by class
Ending Balance	94,386		94,386		66,583
Unpaid Principal Balance	131,350		131,350		104,485
Related Allowance	17,641		17,641		22,604
Average Balance	107,635		85,949
Interest Income Recognized	873		1,510
With an allowance recorded [Member] | Automobile Loan [Member]
Detailed impaired loan information by class
Ending Balance	37,371		37,371		29,764
Unpaid Principal Balance	37,371		37,371		29,764
Related Allowance	1,344		1,344		1,477
Average Balance	33,215		31,451
Interest Income Recognized	847		2,154
With an allowance recorded [Member] | Home equity secured by first-lien other [Member]
Detailed impaired loan information by class
Ending Balance	32,681		32,681		20,553
Unpaid Principal Balance	32,681		32,681		20,675
Related Allowance	638		638		511
Average Balance	27,758		24,734
Interest Income Recognized	354		816
With an allowance recorded [Member] | Home equity Secured by second-lien [Member]
Detailed impaired loan information by class
Ending Balance	15,196		15,196		16,704
Unpaid Principal Balance	15,196		15,196		17,060
Related Allowance	972		972		987
Average Balance	14,714		15,746
Interest Income Recognized	187		550
With an allowance recorded [Member] | Other Consumer loan [Member]
Detailed impaired loan information by class
Ending Balance	4,626		4,626		9,565
Unpaid Principal Balance	4,626		4,626		9,565
Related Allowance	311		311		668
Average Balance	6,768		8,068
Interest Income Recognized	41		373
With no related allowance recorded [Member] | Commercial and Industrial [Member]
Detailed impaired loan information by class
Ending Balance	13,887		13,887		24,877
Unpaid Principal Balance	20,621		20,621		49,291
Related Allowance	0		0		0
Average Balance	7,608		13,223
Interest Income Recognized	159		301
With no related allowance recorded [Member] | Commercial Real Estate [Member]
Detailed impaired loan information by class
Ending Balance	90,905		90,905		69,412
Unpaid Principal Balance	123,665		123,665		142,632
Related Allowance	0		0		0
Average Balance	78,281		64,656
Interest Income Recognized	823		1,511
With no related allowance recorded [Member] | Residential Mortgage [Member]
Detailed impaired loan information by class
Ending Balance	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Balance	0		0
Interest Income Recognized	0		0
With no related allowance recorded [Member] | Commercial and industrial owner occupied [Member]
Detailed impaired loan information by class
Ending Balance	10,105		10,105		13,750
Unpaid Principal Balance	14,456		14,456		26,603
Related Allowance	0		0		0
Average Balance	4,284		7,121
Interest Income Recognized	122		139
With no related allowance recorded [Member] | Other commercial and industrial [Member]
Detailed impaired loan information by class
Ending Balance	3,782		3,782		11,127
Unpaid Principal Balance	6,165		6,165		22,688
Related Allowance	0		0		0
Average Balance	3,324		6,102
Interest Income Recognized	37		162
With no related allowance recorded [Member] | Commercial real estate retail properties [Member]
Detailed impaired loan information by class
Ending Balance	43,746		43,746		31,972
Unpaid Principal Balance	55,370		55,370		67,487
Related Allowance	0		0		0
Average Balance	29,895		21,158
Interest Income Recognized	348		362
With no related allowance recorded [Member] | Commercial real estate Multi family [Member]
Detailed impaired loan information by class
Ending Balance	21,156		21,156		5,058
Unpaid Principal Balance	21,345		21,345		5,675
Related Allowance	0		0		0
Average Balance	16,187		12,951
Interest Income Recognized	188		499
With no related allowance recorded [Member] | Commercial real estate office [Member]
Detailed impaired loan information by class
Ending Balance	1,105		1,105		2,270
Unpaid Principal Balance	1,431		1,431		3,562
Related Allowance	0		0		0
Average Balance	1,542		1,804
Interest Income Recognized	0		0
With no related allowance recorded [Member] | Commercial real estate Industrial and warehouse [Member]
Detailed impaired loan information by class
Ending Balance	1,866		1,866		3,305
Unpaid Principal Balance	2,908		2,908		6,912
Related Allowance	0		0		0
Average Balance	3,098		2,755
Interest Income Recognized	36		41
With no related allowance recorded [Member] | Other commercial real estate [Member]
Detailed impaired loan information by class
Ending Balance	23,032		23,032		26,807
Unpaid Principal Balance	42,611		42,611		58,996
Related Allowance	0		0		0
Average Balance	27,559		25,988
Interest Income Recognized	251		609
With no related allowance recorded [Member] | Automobile Loan [Member]
Detailed impaired loan information by class
Ending Balance	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Balance	0		0
Interest Income Recognized	0		0
With no related allowance recorded [Member] | Home equity secured by first-lien other [Member]
Detailed impaired loan information by class
Ending Balance	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Balance	0		0
Interest Income Recognized	0		0
With no related allowance recorded [Member] | Home equity Secured by second-lien [Member]
Detailed impaired loan information by class
Ending Balance	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Balance	0		0
Interest Income Recognized	0		0
With no related allowance recorded [Member] | Other Consumer loan [Member]
Detailed impaired loan information by class
Ending Balance	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Balance	0		0
Interest Income Recognized	$ 0		$ 0

[1] At September 30, 2011, $32,685 thousand of the $148,052 thousand commercial and industrial loans with an allowance recorded were considered impaired due to their status as a TDR.

[2] At September 30, 2011, $26,916 thousand of the $310,047 thousand commercial real estate loans with an allowance recorded were considered impaired due to their status as a TDR.