Fair Value Of Financial Instruments (Narrative) (Details)	6 Months Ended
	Jun. 30, 2017 USD ($) segment	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Transfers between levels	$ 0	$ 0
Unpaid principal balance	10,073,000		$ 3,484,000
Valuation allowance	1,419,000		527,000
Provisions for loan losses	$ 868,000	$ (9,000)
Number of loan portfolio segments | segment	3
Term of Maturity for Short-term Borrowings	90 days
Loans	$ 2,774,056,000		2,545,421,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unpaid principal balance	8,566,000		1,491,000
Valuation allowance	$ 1,350,000		$ 482,000