Loans (Information By Class Related To Individually Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	$ 249,602		$ 259,713
Unpaid Principal Balance	293,586		304,308
Related Allowance	39,274		41,767
Average balance of impaired loans	254,660	$ 291,167
Interest income recognized on impaired loan	1,612	1,733
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	42,835		45,431
Unpaid Principal Balance	60,187		62,203
Related Allowance	4,555		6,176
Average balance of impaired loans	44,135	49,576
Interest income recognized on impaired loan	187	234
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	206,767		214,282
Unpaid Principal Balance	233,399		242,105
Related Allowance	34,719		35,591
Average balance of impaired loans	210,525	241,591
Interest income recognized on impaired loan	1,425	1,499
Impaired Loans With No Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	25,802		8,183
Unpaid Principal Balance	36,342		17,372
Related Allowance	0		0
Average balance of impaired loans	16,993	10,407
Interest income recognized on impaired loan	187	0
Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	18,293		18,483
Unpaid Principal Balance	30,344		31,544
Related Allowance	0		0
Average balance of impaired loans	18,388	20,548
Interest income recognized on impaired loan	0	0
Impaired Loans With Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	17,033		37,248
Unpaid Principal Balance	23,845		44,831
Related Allowance	4,555		6,176
Average balance of impaired loans	27,142	39,169
Interest income recognized on impaired loan	0	234
Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	188,474		195,799
Unpaid Principal Balance	203,055		210,561
Related Allowance	34,719		35,591
Average balance of impaired loans	192,137	221,043
Interest income recognized on impaired loan	1,425	1,499
General C&I | Impaired Loans With No Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	23,725		8,183
Unpaid Principal Balance	33,797		17,372
Related Allowance	0		0
Average balance of impaired loans	15,954	10,407
Interest income recognized on impaired loan	175	0
General C&I | Impaired Loans With Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	14,007		31,774
Unpaid Principal Balance	20,145		38,256
Related Allowance	3,630		5,119
Average balance of impaired loans	22,891	32,863
Interest income recognized on impaired loan	0	215
TRUPS | Impaired Loans With Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	3,026		3,067
Unpaid Principal Balance	3,700		3,700
Related Allowance	925		925
Average balance of impaired loans	3,047	3,196
Interest income recognized on impaired loan	0	0
Income CRE | Impaired Loans With No Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	1,582		0
Unpaid Principal Balance	1,582		0
Related Allowance	0		0
Average balance of impaired loans	791	0
Interest income recognized on impaired loan	12	0
Income CRE | Impaired Loans With Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	0		1,612
Unpaid Principal Balance	0		1,612
Related Allowance	0		49
Average balance of impaired loans	806	1,817
Interest income recognized on impaired loan	0	14
Residential CRE | Impaired Loans With No Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	495		0
Unpaid Principal Balance	963		0
Related Allowance	0		0
Average balance of impaired loans	248	0
Interest income recognized on impaired loan	0	0
Residential CRE | Impaired Loans With Related Allowance Recorded | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	0		795
Unpaid Principal Balance	0		1,263
Related Allowance	0		83
Average balance of impaired loans	398	1,293
Interest income recognized on impaired loan	0	5
Home Equity Line of Credit | Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	9,256		9,258
Unpaid Principal Balance	18,143		19,193
Related Allowance	0		0
Average balance of impaired loans	9,257	11,054
Interest income recognized on impaired loan	0	0
Home Equity Line of Credit | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	70,839		72,469
Unpaid Principal Balance	73,605		75,207
Related Allowance	13,571		14,382
Average balance of impaired loans	71,654	83,075
Interest income recognized on impaired loan	577	564
R E Installment Loans | Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	3,735		4,093
Unpaid Principal Balance	4,304		4,663
Related Allowance	0		0
Average balance of impaired loans	3,914	3,937
Interest income recognized on impaired loan	0	0
R E Installment Loans | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	41,145		43,075
Unpaid Principal Balance	41,898		43,827
Related Allowance	9,478		8,793
Average balance of impaired loans	42,110	51,902
Interest income recognized on impaired loan	267	318
Permanent Mortgage | Impaired Loans With No Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	5,302		5,132
Unpaid Principal Balance	7,897		7,688
Related Allowance	0		0
Average balance of impaired loans	5,217	5,557
Interest income recognized on impaired loan	0	0
Permanent Mortgage | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	75,788		79,662
Unpaid Principal Balance	86,850		90,934
Related Allowance	11,311		12,105
Average balance of impaired loans	77,725	85,778
Interest income recognized on impaired loan	578	615
Credit Card and Other | Impaired Loans With Related Allowance Recorded | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	702		593
Unpaid Principal Balance	702		593
Related Allowance	359		$ 311
Average balance of impaired loans	648	288
Interest income recognized on impaired loan	$ 3	$ 2