Loans (Information By Class Related To Individually Impaired Loans) (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		$ 312,762,000	$ 348,772,000
Unpaid Principal Balance		371,104,000	403,973,000
Related Allowance		57,876,000	66,361,000
Average Recorded Investment		310,405,000	345,864,000
Interest Income Recognized		1,467,000	1,663,000
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		53,415,000	65,839,000
Unpaid Principal Balance		73,629,000	82,799,000
Related Allowance		9,636,000	6,630,000
Average Recorded Investment		46,471,000	60,790,000
Interest Income Recognized		113,000	290,000
Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		259,347,000	282,933,000
Unpaid Principal Balance		297,475,000	321,174,000
Related Allowance		48,240,000	59,731,000
Average Recorded Investment		263,934,000	285,074,000
Interest Income Recognized		1,354,000	1,373,000
Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		14,845,000	17,839,000
Unpaid Principal Balance		29,009,000	28,169,000
Related Allowance		0	0
Average Recorded Investment		11,692,000	18,537,000
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		19,647,000	24,323,000
Unpaid Principal Balance		40,803,000	46,582,000
Related Allowance		0	0
Average Recorded Investment		19,791,000	24,889,000
Interest Income Recognized		0	3,000
Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		38,570,000	48,000,000
Unpaid Principal Balance		44,620,000	54,630,000
Related Allowance		9,636,000	6,630,000
Average Recorded Investment		34,779,000	42,253,000
Interest Income Recognized		113,000	290,000
Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		239,700,000	258,610,000
Unpaid Principal Balance		256,672,000	274,592,000
Related Allowance		48,240,000	59,731,000
Average Recorded Investment		244,143,000	260,185,000
Interest Income Recognized		1,354,000	1,370,000
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		12,377,000	13,630,000
Unpaid Principal Balance		19,620,000	16,803,000
Related Allowance		0	0
Average Recorded Investment		9,224,000	11,594,000
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		28,781,000	26,252,000
Unpaid Principal Balance		32,664,000	30,759,000
Related Allowance		8,223,000	1,709,000
Average Recorded Investment		24,921,000	19,772,000
Interest Income Recognized		87,000	253,000
TRUPs [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		3,307,000	13,429,000
Unpaid Principal Balance		3,700,000	13,700,000
Related Allowance		925,000	4,310,000
Average Recorded Investment		3,323,000	13,444,000
Interest Income Recognized		0	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		2,468,000	4,209,000
Unpaid Principal Balance		9,389,000	11,366,000
Related Allowance		0	0
Average Recorded Investment		2,468,000	6,369,000
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		5,106,000	6,695,000
Unpaid Principal Balance		6,412,000	8,180,000
Related Allowance		383,000	502,000
Average Recorded Investment		5,138,000	7,540,000
Interest Income Recognized		20,000	30,000
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		0	574,000
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		1,376,000	1,624,000
Unpaid Principal Balance		1,844,000	1,991,000
Related Allowance		105,000	109,000
Average Recorded Investment		1,397,000	1,497,000
Interest Income Recognized		6,000	7,000
Home Equity [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	11,024,000	12,600,000
Unpaid Principal Balance	[1]	28,514,000	31,419,000
Related Allowance	[1]	0	0
Average Recorded Investment	[1]	10,921,000	12,989,000
Interest Income Recognized	[1]	0	0
Home Equity [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		87,726,000	85,102,000
Unpaid Principal Balance		90,338,000	87,242,000
Related Allowance		15,678,000	20,513,000
Average Recorded Investment		88,580,000	84,636,000
Interest Income Recognized		487,000	448,000
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	[1]	4,582,000	4,518,000
Unpaid Principal Balance	[1]	5,829,000	5,827,000
Related Allowance	[1]	0	0
Average Recorded Investment	[1]	4,434,000	4,669,000
Interest Income Recognized	[1]	0	3,000
R E Installment Loans [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		58,796,000	69,391,000
Unpaid Principal Balance		60,147,000	70,384,000
Related Allowance		15,441,000	21,224,000
Average Recorded Investment		59,971,000	70,124,000
Interest Income Recognized		317,000	327,000
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	[1]	4,041,000	7,205,000
Unpaid Principal Balance	[1]	6,460,000	9,336,000
Related Allowance	[1]	0	0
Average Recorded Investment	[1]	4,436,000	7,231,000
Interest Income Recognized	[1]	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		92,833,000	103,633,000
Unpaid Principal Balance		105,839,000	116,482,000
Related Allowance		16,975,000	17,766,000
Average Recorded Investment		95,232,000	104,917,000
Interest Income Recognized		547,000	591,000
Credit Card Other [Member] | Impaired Loans With Related Allowance Recorded [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		345,000	484,000
Unpaid Principal Balance		348,000	484,000
Related Allowance		146,000	228,000
Average Recorded Investment		360,000	508,000
Interest Income Recognized		$ 3,000	$ 4,000

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