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Long-Term Debt - Additional Information (Details) |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 17, 2020 USD ($) | Jun. 12, 2020 USD ($) | Jun. 02, 2020 USD ($) $ / shares shares | Jun. 30, 2021 USD ($) | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from issuance of notes |  |  |  |  |  |  |  |  | $ 547,719,000
Deferred debt issuance costs |  |  |  |  |  |  | $ 629,000 |  | 629,000
Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Deferred debt issuance costs |  |  |  | $ 236,000 |  |  |  | $ 236,000 |
Minimum liquidity |  |  |  | $ 75,000,000 |  |  |  | $ 75,000,000 |
Debt instrument, covenant description |  |  |  |  |  |  |  | The Credit Agreement contains certain affirmative and negative covenants customary for financings of this type that, among other things, limit our and our subsidiaries’ ability to incur additional indebtedness or liens, to dispose of assets, to make certain fundamental changes, to designate subsidiaries as unrestricted, to make certain investments, to prepay certain indebtedness and to pay dividends, or to make other distributions or redemptions/repurchases, in respect of our and our subsidiaries’ equity interests. In addition, the Credit Agreement contains financial covenants, each tested quarterly, (1) a net secured leveraged ratio of not greater than 3.25 to 1.00; (2) a net total leverage ratio of not greater than 4.25 to 1.00; and (3) minimum liquidity of at least $75 million. The Credit Agreement also contains events of default customary for financings of this type, including certain customary change of control events. As of June 30, 2021, we were in compliance with all Credit Agreement covenants. |
Senior Credit Facilities | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio |  |  |  | 4.25 |  |  |  | 4.25 |
Net secured leverage ratio |  |  |  |  |  |  |  | 3.25% |
Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Deferred debt issuance costs | $ 500,000 |  |  |  |  |  |  |  |
Refinancing fee paid to third parties | $ 100,000 |  |  |  |  |  |  |  |
Debt Instrument, interest rate description |  |  |  |  |  |  |  | The Amendment, among other things, revised certain interest rates in the Credit Agreement. Following delivery of a compliance certificate for the first full fiscal quarter after the Amendment No. 1 Effective Date, the applicable margins for the revolving credit and term facilities is subject to a pricing grid based upon the net total leverage ratio as follows (i) if the net total leverage ratio is greater than 3.00 to 1.00, the applicable margin is LIBOR plus 3.00% or ABR plus 2.00%; (ii) if the net total leverage ratio is less than or equal to 3.00 to 1.00 but greater than 2.50 to 1.00, the applicable margin is LIBOR plus 2.75% or ABR plus 1.75%; (iii) if the net total leverage ratio is less than or equal to 2.50 to 1.00 but greater than 2.00 to 1.00, the applicable margin is LIBOR plus 2.50% or ABR plus 1.50%; (iv) if the net total leverage ratio is less than or equal to 2.00 to 1.00 but greater than 1.50 to 1.00, the applicable margin is LIBOR plus 2.25% or ABR plus 1.25%; and (v) if the net total leverage ratio is less than or equal to 1.50 to 1.00, the applicable margin is LIBOR plus 2.20% or ABR plus 1.00%. As a result of the Amendment, the applicable LIBOR floor was reduced from 0.50% to 0.00%. From the Amendment No. 1 Effective Date until the fiscal quarter ended December 31, 2020, the interest rate was LIBOR plus 2.50%. For the three months ended March 31, 2021, the interest rate was LIBOR plus 2.25%. For the three months ended June 30, 2021, the interest rate was LIBOR plus 2.25%. |
Interest expense |  |  |  | $ 800,000 |  |  | 300,000 | $ 3,200,000 | 300,000
Description of unused line fee |  |  |  |  |  |  |  | In addition, the quarterly commitment fee required to be paid based on the unused portion of the revolving facility is subject to a pricing grid based upon the net total leverage ratio as follows (i) if the net total leverage ratio is greater than 3.00 to 1.00, the unused line fee is 0.500%; (ii) if the net total leverage ratio is less than or equal to 3.00 to 1.00 but greater than 2.50 to 1.00, the unused line fee is 0.450%; (iii) if the net total leverage ratio is less than or equal to 2.50 to 1.00 but greater than 2.00 to 1.00, the unused line fee is 0.400%; (iv) if the net total leverage ratio is less than or equal to 2.00 to 1.00 but greater than 1.50 to 1.00, the unused line fee is 0.350%; and (v) if the net total leverage ratio is less than or equal to 1.50 to 1.00, the unused line fee is 0.300%. |
Amended Senior Credit Facilities | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 0.00% | 0.50% |  | 2.25% | 2.25% | 2.50% |  |  |
3.00% Convertible Senior Notes Due 2025 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 175,000,000.0 |  |  |  |  |  |
Debt instrument, interest rate |  |  | 3.00% | 3.00% |  |  |  | 3.00% |
Debt Instrument, option to purchase additional principal amount |  |  | $ 25,000,000.0 |  |  |  |  |  |
Proceeds from issuance of notes |  |  | $ 169,800,000 |  |  |  |  |  |
Debt instrument, maturity date |  |  | Jun. 01, 2025 |  |  |  |  |  |
Debt instrument, conversion initial rate | shares |  |  | 26.7271 |  |  |  |  |  |
Debt instrument, convertible principal amount |  |  | $ 1,000 |  |  |  |  |  |
Debt instrument, conversion price | $ / shares |  |  | $ 37.42 |  |  |  |  |  |
Carrying amount of equity component, net of taxes and transaction costs |  |  |  | $ 14,400,000 |  |  |  | $ 14,400,000 |
Deferred debt issuance costs |  |  |  | 4,005,000 |  |  |  | 4,005,000 |
Interest expense |  |  |  | 2,417,000 |  |  | $ 777,000 | $ 7,199,000 | $ 777,000
Four Year Senior Secured Term Loan Facility | Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument term |  | 4 years |  |  |  |  |  |  |
Credit facility maximum borrowing capacity |  | $ 125,000,000.0 |  |  |  |  |  |  |
Net proceeds from issuance of credit facility |  | 123,000,000.0 |  |  |  |  |  |  |
Four Year Senior Secured Term Loan Facility | Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, frequency of periodic principal payments |  |  |  |  |  |  |  | quarterly |
Debt instrument periodic payments equivalent percentage of annual amount on original principal amount during first two years | 1.25% |  |  |  |  |  |  |  |
Debt instrument periodic payments equivalent percentage of annual amount on original principal amount after two years | 2.50% |  |  |  |  |  |  |  |
Senior Secured First-lien Revolving Credit Facility | Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Credit facility maximum borrowing capacity |  | $ 50,000,000.0 |  |  |  |  |  |  |
Outstanding amount under credit facility |  |  |  | $ 0 |  |  |  | $ 0 |
Net Leverage Ratio Greater Than 3.00 | Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 3.00 |  |  |  |  |  |  |  |
Unused line fee percentage | 50.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Greater Than 3.00 | Amended Senior Credit Facilities | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 3.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Greater Than 3.00 | Amended Senior Credit Facilities | Base Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 2.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 3.00 but Greater Than 2.50 | Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unused line fee percentage | 45.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 3.00 but Greater Than 2.50 | Amended Senior Credit Facilities | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 3.00 |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 3.00 but Greater Than 2.50 | Amended Senior Credit Facilities | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 2.50 |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 3.00 but Greater Than 2.50 | Amended Senior Credit Facilities | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 2.75% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 3.00 but Greater Than 2.50 | Amended Senior Credit Facilities | Base Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 1.75% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.50 but Greater Than 2.00 | Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unused line fee percentage | 40.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.50 but Greater Than 2.00 | Amended Senior Credit Facilities | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 2.50 |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.50 but Greater Than 2.00 | Amended Senior Credit Facilities | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 2.00 |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.50 but Greater Than 2.00 | Amended Senior Credit Facilities | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 2.50% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.50 but Greater Than 2.00 | Amended Senior Credit Facilities | Base Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 1.50% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.00 but Greater Than 1.50 | Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Unused line fee percentage | 35.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.00 but Greater Than 1.50 | Amended Senior Credit Facilities | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 2.00 |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.00 but Greater Than 1.50 | Amended Senior Credit Facilities | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 1.50 |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.00 but Greater Than 1.50 | Amended Senior Credit Facilities | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 2.25% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 2.00 but Greater Than 1.50 | Amended Senior Credit Facilities | Base Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 1.25% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 1.50 | Amended Senior Credit Facilities |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net leverage ratio | 1.50 |  |  |  |  |  |  |  |
Unused line fee percentage | 30.00% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 1.50 | Amended Senior Credit Facilities | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 2.20% |  |  |  |  |  |  |  |
Net Leverage Ratio Less Than or Equal to 1.50 | Amended Senior Credit Facilities | Base Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, basis spread on variable rate | 1.00% |  |  |  |  |  |  |  |

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- 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)) -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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Description of the fees for amounts available, but unused under the credit 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 + Details
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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 + Details
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- 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. + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition Indebtedness divided by net capital. + References No definition available. + Details
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