Loans by Type (Summary of Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Participating Mortgage Loans [Line Items]
Beginning Balance	$ 10,205	$ 10,175
Charge-Offs
Recoveries	10	21
Provision
Ending Balance	10,215	10,196
Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	3,652	3,261
Charge-Offs
Recoveries	10	21
Provision	311	144
Ending Balance	3,973	3,426
Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	1,394	1,662
Charge-Offs
Recoveries
Provision	(80)	(164)
Ending Balance	1,314	1,498
Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	70	47
Charge-Offs
Recoveries
Provision	90	16
Ending Balance	160	63
Real Estate Church Related Mortgage [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	3,962	4,027
Charge-Offs
Recoveries
Provision	(71)	61
Ending Balance	3,891	4,088
Real Estate Church Related Construction [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	196	85
Charge-Offs
Recoveries
Provision	68	8
Ending Balance	264	93
Industrial revenue bonds [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	52	101
Charge-Offs
Recoveries
Provision	(25)	(25)
Ending Balance	27	76
Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Beginning Balance	879	992
Charge-Offs
Recoveries
Provision	(293)	(40)
Ending Balance	$ 586	$ 952

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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