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Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) component quarter	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of primary components | component	2
Lookback period used in reserve analysis | quarter	20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 9,130	$ 9,104
Provision charged to operations	1,375	(25)
Losses charged to allowance	(43)	(9)
Recoveries	84	48
Allowance for credit losses, ending balance	10,546	9,118
Ending balance: individually evaluated for impairment	194		$ 40
Ending balance: collectively evaluated for impairment	10,352		9,090
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	1,428	1,671
Provision charged to operations	225	(252)
Losses charged to allowance	(28)	0
Recoveries	32	31
Allowance for credit losses, ending balance	1,657	1,450
Ending balance: individually evaluated for impairment	175		2
Ending balance: collectively evaluated for impairment	1,482		1,426
Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,769	6,539
Provision charged to operations	786	170
Losses charged to allowance	0	0
Recoveries	0	0
Allowance for credit losses, ending balance	7,555	6,709
Ending balance: individually evaluated for impairment	3		3
Ending balance: collectively evaluated for impairment	7,552		6,766
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	897	826
Provision charged to operations	302	61
Losses charged to allowance	(15)	(9)
Recoveries	52	17
Allowance for credit losses, ending balance	1,236	895
Ending balance: individually evaluated for impairment	16		35
Ending balance: collectively evaluated for impairment	1,220		862
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	36	68
Provision charged to operations	62	(4)
Losses charged to allowance	0	0
Recoveries	0	0
Allowance for credit losses, ending balance	98	$ 64
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	$ 98		$ 36

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- Definition

Financing Receivable, Allowance for Credit Losses, Methodology Change, Number of Rolling Quarters Used in Analysis

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Loans and Leases Receivable, Allowance, Number of Components

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A valuation allowance for financing receivables that are expected to be uncollectible.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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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.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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