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Debt - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jul. 31, 2017 USD ($)
Debt Instrument [Line Items]
Debt issuance costs	$ 700,000	$ 1,100,000
Debt covenant, interest coverage ratio	4.0
Debt covenant, leverage ratio (no more than)	3.0
Senior Facilities Agreement
Debt Instrument [Line Items]
Debt, use of proceeds, amount permitted to dispose of assets without restriction (up to)	$ 25,000,000
Revolving credit facility
Debt Instrument [Line Items]
Debt maximum borrowing capacity			$ 150,000,000
Debt issuance costs			1,000,000.0
Debt, weighted average interest rate	2.19%	2.47%
Uncommitted Facilities
Debt Instrument [Line Items]
Accordion feature, increased limit			$ 50,000,000

X

- Definition

Debt Instrument, Covenant, Maximum Leverage Ratio

+ References

No definition available.

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- Definition

Debt Instrument, Covenant, Minimum Interest Coverage Ratio

+ References

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- Definition

Debt Instrument, Use Of Proceeds, Amount Permitted To Dispose Of Assets Without Restriction

+ References

No definition available.

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X

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

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X

- Definition

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.

+ References

No definition available.

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- Definition

Weighted average interest rate of debt outstanding.

+ References

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X

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ 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 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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