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Debt (Details)	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jul. 30, 2021 USD ($) bank	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Number of banks as lenders | bank			11
Line of credit facility, maximum borrowing capacity			$ 350,000,000
Optional increase (or an accordion feature)	$ 200,000,000		200,000,000
Proceeds from revolving credit facility	82,150,000	$ 100,000,000
Amount of revolving credit facility repaid	55,000,000	$ 110,000,000
Amounts outstanding under the revolving credit facility	$ 102,150,000			$ 75,000,000
Interest rate at period end	1.084%			1.277%
Commitment fee	0.10%
Available for borrowings	$ 247,800,000
Swing Line
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 50,000,000

X

- Definition

Line Of Credit Facility, Accordion Feature

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Number Of Banks As Lenders

+ References

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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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X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
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X

- Definition

The effective interest rate at the end of the reporting period.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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X

- 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.

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X

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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X

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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-Publisher FASB
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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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