Securities Sold Under Agreements to Repurchase and Federal Funds Purchased (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retail Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Total outstanding at December 31	$ 81,800,000
Wholesale Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Total outstanding at December 31	0
Securities Sold Under Agreements to Repurchase
Repurchase Agreement Counterparty [Line Items]
Total outstanding at December 31	81,842,000	$ 75,177,000	$ 69,062,000
Maximum month-end balance	81,842,000	80,326,000	125,063,000
Average balance during the year	$ 63,472,000	$ 64,888,000	$ 99,622,000
Weighted average rate at December 31	0.22%	0.23%	0.88%
Average interest rate paid during the year	0.24%	0.36%	2.24%
Federal Funds Purchased
Repurchase Agreement Counterparty [Line Items]
Average balance during the year	$ 0	$ 0	$ 0
Average interest rate paid during the year	0.00%	0.00%	0.00%

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_SecuritiesSoldUnderAgreementsToRepurchase
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant