Fair Value Measurement (Fair Value Assets And Liabilities Measured On Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	$ 27,647	$ 75,189
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	27,647	75,189
Loans and leases
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	27,535	75,121
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	27,535	75,121
Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, nonrecurring	112	68
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	$ 112	$ 68