Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 2,304	$ 350	$ 2,304	$ 350
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(661)	(1,658)	(3,299)	(1,674)
OREO	335	3,286	335	3,286
Assets, Fair Value Disclosure	2,639	3,636	2,639	3,636
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
OREO	0	0	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
OREO	0	0	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	2,304	350	2,304	350
OREO	335	3,286	335	3,286
Assets, Fair Value Disclosure	2,639	3,636	2,639	3,636
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)	(647)	(1,012)	(3,285)	(1,012)
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)	$ (14)	$ (646)	$ (14)	$ (662)