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Debt Instrument, Default, Percentage Of Principal Amount Outstanding Held

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Debt Instrument, Redemption Price, Percentage Of Principal Amount Outstanding Remaining After Redemption

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- Definition

Debt Instrument, Variable Rate Minimum

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Fixed charge coverage ratio.

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- Definition

Line of credit facility additional increase In maximum borrowing capacity.

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Line of credit facility basis spread on variable rate.

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Percentage Required of Total Current Revolving Loan Commitments

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Percentage of principal amount of debt redeemed.

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

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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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Debt - Narrative (Details) - USD ($)		3 Months Ended	9 Months Ended
Debt - Narrative (Details) - USD ($)	May 20, 2021	Mar. 31, 2022	Sep. 30, 2021	Apr. 30, 2020
Senior Notes \| Senior Secured Green Bonds Due 2028
Debt Instrument [Line Items]
Face amount	$ 550,000,000
Interest rate	5.875%
Fees and offering expenses	$ 14,619,000
Default, percentage of principal amount outstanding held	25.00%
Senior Notes \| Senior Secured Green Bonds Due 2028 \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Percentage of principal amount redeemed	35.00%
Redemption price, percentage	105.875%
Percentage of principal amount outstanding remaining after redemption	65.00%
Senior Notes \| Senior Secured Green Bonds Due 2028 \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes \| Senior Secured Green Bonds Due 2028 \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, percentage	102.938%
Senior Notes \| Senior Secured Green Bonds Due 2028 \| Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Redemption price, percentage	101.469%
Senior Notes \| Senior Secured Green Bonds Due 2028 \| Debt Instrument, Redemption, Period Five
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes \| Senior Secured Green Bonds Due 2028 \| Debt Instrument, Redemption, Period Six
Debt Instrument [Line Items]
Redemption price, percentage	101.00%
Wells Fargo Revolver
Debt Instrument [Line Items]
Line of credit		$ 250,000,000	$ 250,000,000	$ 150,000,000
Line of Credit Facility Additional Increase in Maximum Borrowing Capacity		$ 100,000,000	$ 50,000,000
Debt instrument, variable rate minimum		0.00%
Amount required of total current revolving loan commitments		$ 25,000,000
Wells Fargo Revolver \| Minimum
Debt Instrument [Line Items]
LIBOR rate margin		1.50%
Fixed charge coverate ratio		1.0
Wells Fargo Revolver \| Maximum
Debt Instrument [Line Items]
LIBOR rate margin		2.00%
Fixed charge coverate ratio		1.0
Percentage required of total current revolving loan commitments		10.00%