Loans And Allowance For Loan Losses (Total Average Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	$ 19,034	$ 26,298	$ 23,723	$ 31,575
Restructured loans (accruing)	48,454	31,620	46,476	35,466
Total	67,488	57,918	70,199	67,041
Commercial Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	15,106	21,119	19,387	25,784
Restructured loans (accruing)	31,372	13,399	29,117	16,612
Total	46,478	34,518	48,504	42,396
Personal Banking Portfolio Segment [Member]
Loans And Allowance For Loan Losses [Line Items]
Non-accrual loans	3,928	5,179	4,336	5,791
Restructured loans (accruing)	17,082	18,221	17,359	18,854
Total	$ 21,010	$ 23,400	$ 21,695	$ 24,645