Allowance For Loan Losses, Allowance For Losses On Lending-Related Commitments And Impaired Loans (Summary Of Impaired Loans Evaluated For Impairment By Loan Class) (Details) (USD $) In Thousands	6 Months Ended				12 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Dec. 31, 2010
Recorded Investment	$ 225,853	[1]	$ 163,104	[1]	$ 202,274	[1]
Unpaid Principal Balance	273,108		188,725		230,419
Related Allowance	27,305		24,018		30,626
Average Recorded Investment	242,363		169,335		213,982
Interest Income Recognized	7,242		5,409		12,999
Commercial Loans [Member] | Commercial and Industrial [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	17,620		11,962		17,678
Unpaid Principal Balance	29,123		14,664		19,789
Related Allowance	5,937		5,013		5,939
Average Recorded Investment	15,843		12,218		19,574
Interest Income Recognized	742		330		982
Commercial Loans [Member] | Commercial and Industrial [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	17,065		8,920		12,407
Unpaid Principal Balance	23,716		12,353		16,368
Related Allowance			173		157
Average Recorded Investment	19,943		9,573		13,210
Interest Income Recognized	544		375		971
Commercial Loans [Member] | Franchise [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	1,792
Unpaid Principal Balance	1,792
Average Recorded Investment	1,792
Interest Income Recognized	60
Commercial Loans [Member] | Asset-Based Lending [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	2,087		922		407
Unpaid Principal Balance	2,087		922		976
Related Allowance	1,595		583		140
Average Recorded Investment	2,108		922		876
Interest Income Recognized	55		25		60
Commercial Loans [Member] | Asset-Based Lending [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment			297		10
Unpaid Principal Balance			391		130
Average Recorded Investment			412		121
Interest Income Recognized			12		9
Commercial Loans [Member] | Leases [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment			66		43
Unpaid Principal Balance			70		336
Related Allowance			3
Average Recorded Investment			67		491
Interest Income Recognized			3		36
Commercial Real-Estate Loans [Member] | Residential Construction [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	1,116		10,802		7,978
Unpaid Principal Balance	1,118		11,239		8,941
Related Allowance	293		2,622		710
Average Recorded Investment	1,118		11,426		9,067
Interest Income Recognized	28		340		621
Commercial Real-Estate Loans [Member] | Residential Construction [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	4,522		11,536		6,063
Unpaid Principal Balance	5,268		11,991		6,138
Related Allowance			225		127
Average Recorded Investment	6,511		11,396		5,927
Interest Income Recognized	257		297		268
Commercial Real-Estate Loans [Member] | Commercial Construction [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	2,076		12,855		719
Unpaid Principal Balance	2,501		14,059		719
Related Allowance	326		3,669		631
Average Recorded Investment	2,258		12,989		722
Interest Income Recognized	69		530		37
Commercial Real-Estate Loans [Member] | Commercial Construction [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	11,151		1,635		1,713
Unpaid Principal Balance	11,151		1,635		1,713
Related Allowance			39		5
Average Recorded Investment	11,428		1,823		1,715
Interest Income Recognized	261		47		97
Commercial Real-Estate Loans [Member] | Land [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	20,427		13,926		26,671
Unpaid Principal Balance	22,644		20,923		27,424
Related Allowance	5,841		2,560		5,598
Average Recorded Investment	21,127		14,668		28,443
Interest Income Recognized	557		688		1,611
Commercial Real-Estate Loans [Member] | Land [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	21,486		22,977		31,598
Unpaid Principal Balance	30,975		29,052		43,319
Related Allowance			932		1,035
Average Recorded Investment	22,172		24,296		34,258
Interest Income Recognized	959		759		2,361
Commercial Real-Estate Loans [Member] | Office [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	14,427		1,876		13,186
Unpaid Principal Balance	16,527		2,380		13,723
Related Allowance	4,551		584		3,718
Average Recorded Investment	16,090		2,094		13,448
Interest Income Recognized	501		47		917
Commercial Real-Estate Loans [Member] | Office [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	12,579		4,345		6,365
Unpaid Principal Balance	12,613		4,404		6,563
Related Allowance			111		78
Average Recorded Investment	12,627		4,370		6,370
Interest Income Recognized	299		162		358
Commercial Real-Estate Loans [Member] | Industrial [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	159		1,360		2,761
Unpaid Principal Balance	162		1,360		2,761
Related Allowance	32		271		301
Average Recorded Investment	160		1,361		893
Interest Income Recognized	6		54		31
Commercial Real-Estate Loans [Member] | Industrial [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	6,844		4,180		3,869
Unpaid Principal Balance	7,385		4,181		3,868
Related Allowance			178		49
Average Recorded Investment	7,315		4,214		4,086
Interest Income Recognized	193		133		286
Commercial Real-Estate Loans [Member] | Retail [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	3,407		4,211		8,635
Unpaid Principal Balance	4,495		4,274		9,171
Related Allowance	979		521		1,271
Average Recorded Investment	3,913		4,266		9,150
Interest Income Recognized	115		100		465
Commercial Real-Estate Loans [Member] | Retail [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	12,373		5,266		6,155
Unpaid Principal Balance	14,833		5,266		6,155
Related Allowance			94		75
Average Recorded Investment	15,153		5,274		6,153
Interest Income Recognized	458		153		346
Commercial Real-Estate Loans [Member] | Multi-Family [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	2,452		9,626		5,939
Unpaid Principal Balance	2,458		11,641		6,767
Related Allowance	744		1,587		2,062
Average Recorded Investment	2,465		10,921		6,691
Interest Income Recognized	64		276		327
Commercial Real-Estate Loans [Member] | Multi-Family [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	2,718		4,658		2,238
Unpaid Principal Balance	6,877		4,658		4,479
Related Allowance			81		27
Average Recorded Investment	5,563		4,758		2,584
Interest Income Recognized	173		115		150
Commercial Real-Estate Loans [Member] | Mixed Use and Other [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	11,161		10,584		21,755
Unpaid Principal Balance	11,352		11,010		22,885
Related Allowance	2,906		2,824		7,104
Average Recorded Investment	11,238		10,758		23,310
Interest Income Recognized	329		337		1,466
Commercial Real-Estate Loans [Member] | Mixed Use and Other [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	35,258		9,199		13,738
Unpaid Principal Balance	39,189		9,444		15,569
Related Allowance			203		124
Average Recorded Investment	37,421		8,990		14,343
Interest Income Recognized	941		281		919
Home Equity [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	12,898		5,549		6,356
Unpaid Principal Balance	13,251		6,143		6,553
Related Allowance	2,143		1,401		961
Average Recorded Investment	13,000		6,054		6,494
Interest Income Recognized	333		161		365
Home Equity [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	2,954		1,600		1,069
Unpaid Principal Balance	3,412		1,901		1,142
Related Allowance			54		13
Average Recorded Investment	3,208		1,738		1,119
Interest Income Recognized	65		37		39
Residential Real Estate [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	5,791		1,608		3,283
Unpaid Principal Balance	5,921		1,608		3,283
Related Allowance	1,619		217		461
Average Recorded Investment	5,798		1,607		3,288
Interest Income Recognized	119		43		170
Residential Real Estate [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	2,667		2,998		1,485
Unpaid Principal Balance	3,142		2,998		1,486
Related Allowance			60		34
Average Recorded Investment	3,109		2,985		1,478
Interest Income Recognized	87		97		93
Indirect Consumer [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	49		31
Unpaid Principal Balance	50		31
Related Allowance	9		9
Average Recorded Investment	50		31
Interest Income Recognized	2		1
Indirect Consumer [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	17		54		59
Unpaid Principal Balance	24		61		67
Related Allowance			2		1
Average Recorded Investment	19		57		68
Interest Income Recognized	1		3		7
Consumer and Other [Member] | Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	386				13
Unpaid Principal Balance	386				13
Related Allowance	330				4
Average Recorded Investment	368				15
Interest Income Recognized	9				1
Consumer and Other [Member] | Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	371		61		81
Unpaid Principal Balance	656		66		81
Related Allowance			2		1
Average Recorded Investment	566		67		88
Interest Income Recognized	15		3		6
Impaired Financing Receivables With Related Allowance [Member]
Recorded Investment	94,056	[2]	85,312	[2]	115,381	[2]
Impaired Financing Receivables With no Related Allowance [Member]
Recorded Investment	$ 131,797		$ 77,792		$ 86,893

[1] Impaired loans are considered by the Company to be non-accrual loans, restructured loans or loans with principal and/or interest at risk, even if the loan is current with all payments of principal and interest.

[2] These impaired loans require an allowance for loan losses because the estimated fair value of the loans or related collateral is less than the recorded investment in the loans.