Loans - Average Recorded Investment - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	$ 16,506	$ 18,285
Interest Income Recognized on an Accrual Basis on Impaired Loans	108	88
Interest Income Recognized on a Cash Basis on Impaired Loans	79	44
Commercial, financial, and agricultural
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	533	1,149
Interest Income Recognized on an Accrual Basis on Impaired Loans	4	5
Interest Income Recognized on a Cash Basis on Impaired Loans	1	7
Residential
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	2,899	1,644
Interest Income Recognized on an Accrual Basis on Impaired Loans	22	12
Interest Income Recognized on a Cash Basis on Impaired Loans	14	5
Commercial
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	12,829	14,773
Interest Income Recognized on an Accrual Basis on Impaired Loans	82	71
Interest Income Recognized on a Cash Basis on Impaired Loans	63	25
Construction
Credit Quality and Related Allowance for Loan Losses
Average Investment in Impaired Loans	245	719
Interest Income Recognized on an Accrual Basis on Impaired Loans	0	0
Interest Income Recognized on a Cash Basis on Impaired Loans	$ 1	$ 7

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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+ References

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