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Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure Text Block [Abstract]
Weighted average remaining lease term	5 years 1 month 6 days
Operating lease, weighted average discount rate	3.10%
Operating leases	$ 1.4	$ 1.8
Operating lease payments	1.5	1.6
Noncash additions to operating lease assets	$ 0.0	$ 0.7

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- References

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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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-Publisher FASB
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Amount of amortization expense for right-of-use asset from operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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