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Summary of Significant Accounting Policies - Self-Insurance (Narrative) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies
Self Insurance Reserve	$ 933,000	$ 1,203,000

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- References

No definition available.

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- Definition

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Name:	us-gaap_SelfInsuranceReserve
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