Commitments and Contingent Liabilities and Guarantees (Narrative) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Letter of Credit expiration period	1 year
Commitments to Grant Loans [Member]
Loss Contingencies [Line Items]
Outstanding loans commitments and other unused lines of credit	$ 82,090,000	$ 87,223,000
Outstanding Letters Of Credit [Member]
Loss Contingencies [Line Items]
Outstanding loans commitments and other unused lines of credit	2,087,000	2,749,000
Commercial Letter Of Credit [Member]
Loss Contingencies [Line Items]
Outstanding loans commitments and other unused lines of credit	$ 9,808,000	$ 8,925,000