Loans by Type (Summary of Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Participating Mortgage Loans [Line Items]
Beginning Balance	$ 10,225	$ 10,205
Charge-Offs
Recoveries	11	5
Provision	250
Ending Balance	10,486	10,210
Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	4,179	3,652
Charge-Offs
Recoveries	11	5
Provision	529	320
Ending Balance	4,719	3,977
Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	1,417	1,394
Charge-Offs
Recoveries
Provision	(33)	(53)
Ending Balance	1,384	1,341
Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	89	70
Charge-Offs
Recoveries
Provision	26	48
Ending Balance	115	118
Real Estate Church, church-related Mortgage [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	3,961	3,962
Charge-Offs
Recoveries
Provision	(51)	(106)
Ending Balance	3,910	3,856
Real Estate Church, church-related Construction [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	155	196
Charge-Offs
Recoveries
Provision	(27)	22
Ending Balance	128	218
Industrial Revenue Bonds [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance		52
Charge-Offs
Recoveries
Provision		(12)
Ending Balance		40
Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	424	879
Charge-Offs
Recoveries
Provision	(194)	(219)
Ending Balance	$ 230	$ 660

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of expense related to estimated loss from loan and lease transactions.

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