Fair Value Measurement (Fair Value Assets And Liabilities Measured On Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	$ 75,189	$ 28,365
Level 1
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	0	0
Level 2
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	0	0
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	75,189	28,365
Loans And Leases
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	75,121	25,753
Loans And Leases | Level 1
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	0	0
Loans And Leases | Level 2
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	0	0
Loans And Leases | Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	75,121	25,753
Other Real Estate Owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	68	2,612
Other Real Estate Owned | Level 1
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	0	0
Other Real Estate Owned | Level 2
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	0	0
Other Real Estate Owned | Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	$ 68	$ 2,612