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Off-Balance Sheet Loan Commitments - Summary of Financial Instruments with Off-Balance Sheet Risk - (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Unused Lines of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments, off balance sheet risk, Fixed Rate	$ 87,788	$ 133,634
Financial instruments, off balance sheet risk, Variable Rate	295,850	242,236
Mortgage Warehouse Commitments
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments, off balance sheet risk, Variable Rate	242,186	239,632
Standby Letters of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments, off balance sheet risk, Fixed Rate	2,513	1,998
Financial instruments, off balance sheet risk, Variable Rate	$ 2,647	$ 8,169

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+ References

No definition available.

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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=75032840&loc=d3e61044-112788

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=75032840&loc=d3e61082-112788

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=75032840&loc=d3e61082-112788

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=75032840&loc=d3e61044-112788

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