Credit Quality of Loans and Allowance for Loan Losses - Schedule of Modified Troubled Debt Restructurings During the Period (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| contract	0	0	0	1
Pre-modification recorded investment \| $				$ 2,000
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| contract	0	0	0	1
Pre-modification recorded investment \| $	$ 0	$ 0	$ 0	$ 1,984

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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- Details

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