Loans (Information By Class Related To Individually Impaired Loans) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 348,772,000		$ 378,295,000
Unpaid Principal Balance	403,973,000		445,119,000
Related Allowance	66,361,000		69,782,000
Average Recorded Investment	345,864,000		391,004,000
Interest Income Recognized	1,663,000		1,681,000
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	65,839,000		82,104,000
Unpaid Principal Balance	82,799,000		104,853,000
Related Allowance	6,630,000		6,682,000
Average Recorded Investment	60,790,000		96,696,000
Interest Income Recognized	290,000		244,000
Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	282,933,000		296,191,000
Unpaid Principal Balance	321,174,000		340,266,000
Related Allowance	59,731,000		63,100,000
Average Recorded Investment	285,074,000		294,308,000
Interest Income Recognized	1,373,000		1,437,000
Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	17,839,000		22,630,000
Unpaid Principal Balance	28,169,000		32,177,000
Related Allowance	0		0
Average Recorded Investment	18,537,000		32,140,000
Interest Income Recognized	0		0
Impaired Loans With No Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	24,323,000		34,405,000
Unpaid Principal Balance	46,582,000		62,161,000
Related Allowance	0		0
Average Recorded Investment	24,889,000		35,350,000
Interest Income Recognized	3,000		0
Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	48,000,000		59,474,000
Unpaid Principal Balance	54,630,000		72,676,000
Related Allowance	6,630,000		6,682,000
Average Recorded Investment	42,253,000		64,556,000
Interest Income Recognized	290,000		244,000
Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	258,610,000		261,786,000
Unpaid Principal Balance	274,592,000		278,105,000
Related Allowance	59,731,000		63,100,000
Average Recorded Investment	260,185,000		258,958,000
Interest Income Recognized	1,370,000		1,437,000
General C I [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	13,630,000		14,130,000
Unpaid Principal Balance	16,803,000		15,648,000
Related Allowance	0		0
Average Recorded Investment	11,594,000		20,378,000
Interest Income Recognized	0		0
General C I [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	26,252,000		27,723,000
Unpaid Principal Balance	30,759,000		33,911,000
Related Allowance	1,709,000		1,201,000
Average Recorded Investment	19,772,000		22,232,000
Interest Income Recognized	253,000		79,000
TRUPs [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	0		3,250,000
Interest Income Recognized	0
TRUPs [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	13,429,000		13,550,000
Unpaid Principal Balance	13,700,000		13,550,000
Related Allowance	4,310,000		3,986,000
Average Recorded Investment	13,444,000		23,580,000
Interest Income Recognized	0
Income C R E [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	4,209,000		8,500,000
Unpaid Principal Balance	11,366,000		16,529,000
Related Allowance	0		0
Average Recorded Investment	6,369,000		8,512,000
Interest Income Recognized	0		0
Income C R E [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	6,695,000		11,821,000
Unpaid Principal Balance	8,180,000		13,540,000
Related Allowance	502,000		783,000
Average Recorded Investment	7,540,000		12,097,000
Interest Income Recognized	30,000		102,000
Residential C R E [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	574,000		0
Interest Income Recognized	0		0
Residential C R E [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	1,624,000		6,380,000
Unpaid Principal Balance	1,991,000		11,675,000
Related Allowance	109,000		712,000
Average Recorded Investment	1,497,000		6,647,000
Interest Income Recognized	7,000		63,000
Home Equity [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	12,600,000	[1]	16,151,000	[1]
Unpaid Principal Balance	31,419,000		37,723,000
Related Allowance	0		0
Average Recorded Investment	12,989,000		16,488,000
Interest Income Recognized	0		0
Home Equity [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	85,102,000		73,287,000
Unpaid Principal Balance	87,242,000		74,730,000
Related Allowance	20,513,000		17,080,000
Average Recorded Investment	84,636,000		71,792,000
Interest Income Recognized	448,000		434,000
R E Installment Loans [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	4,518,000	[1]	10,400,000	[1]
Unpaid Principal Balance	5,827,000		13,360,000
Related Allowance	0		0
Average Recorded Investment	4,669,000		10,705,000
Interest Income Recognized	3,000		0
R E Installment Loans [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	69,391,000		73,738,000
Unpaid Principal Balance	70,384,000		74,645,000
Related Allowance	21,224,000		26,573,000
Average Recorded Investment	70,124,000		73,015,000
Interest Income Recognized	327,000		269,000
Permanent Mortgage Portfolio Segment [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	7,205,000	[1]	7,854,000	[1]
Unpaid Principal Balance	9,336,000		11,078,000
Related Allowance	0		0
Average Recorded Investment	7,231,000		8,157,000
Interest Income Recognized	0		0
Permanent Mortgage Portfolio Segment [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	103,633,000		113,989,000
Unpaid Principal Balance	116,482,000		127,958,000
Related Allowance	17,766,000		19,211,000
Average Recorded Investment	104,917,000		113,493,000
Interest Income Recognized	591,000		723,000
Credit Card Other [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	484,000		772,000
Unpaid Principal Balance	484,000		772,000
Related Allowance	228,000		236,000
Average Recorded Investment	508,000		658,000
Interest Income Recognized	$ 4,000		$ 11,000

[1] All discharged bankruptcy loans are charged down to an estimate of net realizable value and do not carry any allowance.