Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 8,990	$ 14,616	$ 8,990	$ 14,616
Fair Value, Option, Changes in Fair Value, Gain (Loss)	1,722	1,653	3,299	1,653
Other Real Estate Owned, Fair Value Disclosure		1,240		1,240
Assets, Fair Value Disclosure	8,990	15,856	8,990	15,856
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0	0	0
Other Real Estate Owned, Fair Value Disclosure		0		0
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0	0	0
Other Real Estate Owned, Fair Value Disclosure		0		0
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	8,990	14,616	8,990	14,616
Other Real Estate Owned, Fair Value Disclosure		1,240		1,240
Assets, Fair Value Disclosure	8,990	15,856	8,990	15,856
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 1,722	1,208	$ 3,299	1,208
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		$ 445		$ 445