Loans (Information By Class Related To Individually Impaired Loans) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		$ 265,330		$ 265,330		$ 298,778
Unpaid Principal Balance		303,482		303,482		336,303
Related Allowance		42,985		42,985		45,818
Average balance of impaired loans		274,444	$ 316,045	282,802	$ 313,222
Interest income recognized on impaired loan		1,679	1,701	3,411	3,138
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		41,058		41,058		51,086
Unpaid Principal Balance		49,676		49,676		58,776
Related Allowance		3,817		3,817		4,413
Average balance of impaired loans		44,563	56,581	47,069	51,525
Interest income recognized on impaired loan		208	318	441	431
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		224,272		224,272		247,692
Unpaid Principal Balance		253,806		253,806		277,527
Related Allowance		39,168		39,168		41,405
Average balance of impaired loans		229,881	259,464	235,733	261,697
Interest income recognized on impaired loan		1,471	1,383	2,970	2,707
Impaired Loans With No Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		9,487		9,487		10,419
Unpaid Principal Balance		16,604		16,604		16,636
Related Allowance		0		0		0
Average balance of impaired loans		9,941	15,801	10,174	13,746
Interest income recognized on impaired loan		0	0	0	0
Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		19,774		19,774		20,651
Unpaid Principal Balance		34,110		34,110		34,553
Related Allowance		0		0		0
Average balance of impaired loans		20,110	19,673	20,328	19,731
Interest income recognized on impaired loan		0	0	0	0
Impaired Loans With Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		31,571		31,571		40,667
Unpaid Principal Balance		33,072		33,072		42,140
Related Allowance		3,817		3,817		4,413
Average balance of impaired loans		34,622	40,780	36,895	37,779
Interest income recognized on impaired loan		208	318	441	431
Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		204,498		204,498		227,041
Unpaid Principal Balance		219,696		219,696		242,974
Related Allowance		39,168		39,168		41,405
Average balance of impaired loans		209,771	239,791	215,405	241,966
Interest income recognized on impaired loan		1,471	1,383	2,970	2,707
General C I | Impaired Loans With No Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		9,487		9,487		10,419
Unpaid Principal Balance		16,604		16,604		16,636
Related Allowance		0		0		0
Average balance of impaired loans		9,941	13,333	10,174	11,278
Interest income recognized on impaired loan		0	0	0	0
General C I | Impaired Loans With Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		25,411		25,411		34,334
Unpaid Principal Balance		25,880		25,880		34,470
Related Allowance		2,716		2,716		3,294
Average balance of impaired loans		28,402	31,333	30,632	28,127
Interest income recognized on impaired loan		189	292	403	379
TRUPs | Impaired Loans With Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		3,136		3,136		3,209
Unpaid Principal Balance		3,700		3,700		3,700
Related Allowance		925		925		925
Average balance of impaired loans		3,160	3,291	3,178	3,307
Interest income recognized on impaired loan		0	0	0	0
Income C R E | Impaired Loans With No Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		0		0		0
Unpaid Principal Balance		0		0		0
Related Allowance		0		0		0
Average balance of impaired loans		0	2,468	0	2,468
Interest income recognized on impaired loan		0	0	0	0
Income C R E | Impaired Loans With Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		1,731		1,731		1,831
Unpaid Principal Balance		1,731		1,731		2,209
Related Allowance		57		57		62
Average balance of impaired loans		1,767	4,780	1,792	4,959
Interest income recognized on impaired loan		14	20	28	40
Residential C R E | Impaired Loans With Related Allowance Recorded | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		1,293		1,293		1,293
Unpaid Principal Balance		1,761		1,761		1,761
Related Allowance		119		119		132
Average balance of impaired loans		1,293	1,376	1,293	1,386
Interest income recognized on impaired loan		5	6	10	12
Home Equity Line of Credit | Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	9,937		9,937		11,383
Unpaid Principal Balance	[1]	20,411		20,411		21,662
Related Allowance	[1]	0		0		0
Average balance of impaired loans	[2]	10,331	11,105	10,692	11,013
Interest income recognized on impaired loan	[2]	0	0	0	0
Home Equity Line of Credit | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		75,778		75,778		84,711
Unpaid Principal Balance		78,449		78,449		87,126
Related Allowance		16,061		16,061		15,927
Average balance of impaired loans		78,608	88,299	80,841	88,439
Interest income recognized on impaired loan		577	494	1,141	981
R E Installment Loans | Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	3,933		3,933		3,957
Unpaid Principal Balance	[1]	4,960		4,960		4,992
Related Allowance	[1]	0		0		0
Average balance of impaired loans	[2]	3,925	4,407	3,931	4,420
Interest income recognized on impaired loan	[2]	0	0	0	0
R E Installment Loans | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		48,351		48,351		53,409
Unpaid Principal Balance		49,143		49,143		54,559
Related Allowance		11,088		11,088		12,875
Average balance of impaired loans		49,373	58,923	50,637	59,447
Interest income recognized on impaired loan		317	345	635	662
Permanent Mortgage Portfolio Segment | Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	[1]	5,904		5,904		5,311
Unpaid Principal Balance	[1]	8,739		8,739		7,899
Related Allowance	[1]	0		0		0
Average balance of impaired loans	[2]	5,854	4,161	5,705	4,298
Interest income recognized on impaired loan	[2]	0	0	0	0
Permanent Mortgage Portfolio Segment | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		80,009		80,009		88,615
Unpaid Principal Balance		91,744		91,744		100,983
Related Allowance		11,858		11,858		12,470
Average balance of impaired loans		81,475	92,218	83,626	93,725
Interest income recognized on impaired loan		574	541	1,189	1,058
Credit Card And Other Portfolio Segment | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment		360		360		306
Unpaid Principal Balance		360		360		306
Related Allowance		161		161		$ 133
Average balance of impaired loans		315	351	301	355
Interest income recognized on impaired loan		$ 3	$ 3	$ 5	$ 6

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

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