Loans (Information By Class Related To Individually Impaired Loans) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		$ 283,550		$ 298,778
Unpaid Principal Balance		321,629		336,303
Related Allowance		44,322		45,818
Average Recorded Investment		291,167	$ 310,405	310,368
Interest Income Recognized		1,733	1,467	6,779
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		48,066		51,086
Unpaid Principal Balance		55,786		58,776
Related Allowance		3,967		4,413
Average Recorded Investment		49,576	46,471	52,779
Interest Income Recognized		234	113	994
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		235,484		247,692
Unpaid Principal Balance		265,843		277,527
Related Allowance		40,355		41,405
Average Recorded Investment		241,591	263,934	257,589
Interest Income Recognized		1,499	1,354	5,785
Impaired Loans With No Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		10,395		10,419
Unpaid Principal Balance		16,612		16,636
Related Allowance		0		0
Average Recorded Investment		10,407	11,692	13,552
Interest Income Recognized		0	0	0
Impaired Loans With No Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		20,443		20,651
Unpaid Principal Balance		35,614		34,553
Related Allowance		0		0
Average Recorded Investment		20,548	19,791	19,841
Interest Income Recognized		0	0	0
Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		37,671		40,667
Unpaid Principal Balance		39,174		42,140
Related Allowance		3,967		4,413
Average Recorded Investment		39,169	34,779	39,227
Interest Income Recognized		234	113	994
Impaired Loans With Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		215,041		227,041
Unpaid Principal Balance		230,229		242,974
Related Allowance		40,355		41,405
Average Recorded Investment		221,043	244,143	237,748
Interest Income Recognized		1,499	1,354	5,785
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		10,395		10,419
Unpaid Principal Balance		16,612		16,636
Related Allowance		0		0
Average Recorded Investment		10,407	9,224	12,009
Interest Income Recognized		0	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		31,392		34,334
Unpaid Principal Balance		31,532		34,470
Related Allowance		2,850		3,294
Average Recorded Investment		32,863	24,921	30,836
Interest Income Recognized		215	87	902
TRUPs [Member] | Impaired Loans With Related Allowance Recorded [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		3,183		3,209
Unpaid Principal Balance		3,700		3,700
Related Allowance		925		925
Average Recorded Investment		3,196	3,323	3,274
Interest Income Recognized		0	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		0		0
Unpaid Principal Balance		0		0
Related Allowance		0		0
Average Recorded Investment		0	2,468	1,543
Interest Income Recognized		0	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		1,803		1,831
Unpaid Principal Balance		2,181		2,209
Related Allowance		61		62
Average Recorded Investment		1,817	5,138	3,757
Interest Income Recognized		14	20	70
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		1,293		1,293
Unpaid Principal Balance		1,761		1,761
Related Allowance		131		132
Average Recorded Investment		1,293	1,397	1,360
Interest Income Recognized		5	6	22
Home Equity [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	10,724		11,383
Unpaid Principal Balance	[1]	22,020		21,662
Related Allowance	[1]	0		0
Average Recorded Investment	[1]	11,054	10,921	11,168
Interest Income Recognized	[1]	0	0	0
Home Equity [Member] | Impaired Loans With Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		81,438		84,711
Unpaid Principal Balance		83,888		87,126
Related Allowance		16,641		15,927
Average Recorded Investment		83,075	88,580	87,659
Interest Income Recognized		564	487	2,092
R E Installment Loans [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	3,916		3,957
Unpaid Principal Balance	[1]	4,987		4,992
Related Allowance	[1]	0		0
Average Recorded Investment	[1]	3,937	4,434	4,255
Interest Income Recognized	[1]	0	0	0
R E Installment Loans [Member] | Impaired Loans With Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		50,394		53,409
Unpaid Principal Balance		51,317		54,559
Related Allowance		12,060		12,875
Average Recorded Investment		51,902	59,971	57,906
Interest Income Recognized		318	317	1,370
Permanent Mortgage Portfolio Segment [Member] | Impaired Loans With No Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	5,803		5,311
Unpaid Principal Balance	[1]	8,607		7,899
Related Allowance	[1]	0		0
Average Recorded Investment	[1]	5,557	4,436	4,418
Interest Income Recognized	[1]	0	0	0
Permanent Mortgage Portfolio Segment [Member] | Impaired Loans With Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		82,940		88,615
Unpaid Principal Balance		94,755		100,983
Related Allowance		11,532		12,470
Average Recorded Investment		85,778	95,232	91,838
Interest Income Recognized		615	547	2,310
Credit Card Other [Member] | Impaired Loans With Related Allowance Recorded [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		269		306
Unpaid Principal Balance		269		306
Related Allowance		122		133
Average Recorded Investment		288	360	345
Interest Income Recognized		$ 2	$ 3	$ 13

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