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Borrowings and Borrowing Capacity - Summary of Customer Repurchase Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Amount outstanding at end of the year	$ 4,485	$ 11,488
Weighted average interest rate at end of the year	0.01%	0.02%
Average daily balance during the year	$ 8,648	$ 12,906
Weighted average interest rate during the year	0.02%	0.02%
Maximum month-end balance during the year	$ 13,844	$ 21,041

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Securities sold under agreements to repurchase average daily balance.

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Securities sold under agreements to repurchase maximum outstanding at any month end.

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Securities sold under agreements to repurchase weighted average interest rate at end of year.

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Securities sold under agreements to repurchase weighted average interest rates.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
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-Subparagraph (c)
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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