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Debt (Details Textual) |  |  | 6 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 01, 2024 | Mar. 23, 2016 USD ($) | Jun. 30, 2018 | Dec. 31, 2020 | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 12, 2019 USD ($) | Sep. 30, 2018 | May 03, 2016 USD ($)
Debt [Line Items] |  |  |  |  |  |  |  |  |
Amount outstanding under the line of credit |  |  |  |  | $ 8,091,000 |  |  |  |
Amount of letters of credit outstanding |  |  |  |  | $ 4,744,000 | $ 4,744,000 |  |  |
Wells Fargo Capital Finance, LLC | Base Rate |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  | 1.50%
Wells Fargo Capital Finance, LLC | Non-Prime Rate and Prime Rate on European Advances |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  |  | 0.75%
Wells Fargo Capital Finance, LLC | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 325,000,000.0
Ratio of Indebtedness to Net Capital |  |  |  |  |  |  |  |  | 5.5
Senior Notes | 6.50% Notes due 2024 |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 900,000 |  |  |  |  |  |  |
Interest rate, stated percentage |  | 6.50% |  |  |  |  |  | 6.50% |
Debt instrument, maturity date |  | May 01, 2024 |  |  |  |  |  |  |
Debt instrument, redemption date, one |  |  | May 01, 2019 |  |  |  |  |  |
Line of Credit [Member] | Amendment, Credit Agreement [Member] |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 250,000,000 |  |
Ratio of Indebtedness to Net Capital |  |  |  |  |  |  | 6.25 |  |
Forecast | Wells Fargo Capital Finance, LLC | 6.50% Notes due 2024 |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, maturity date | May 01, 2024 |  |  |  |  |  |  |  |
Forecast | Line of Credit [Member] | Amendment, Credit Agreement [Member] |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |
Ratio of Indebtedness to Net Capital |  |  |  | 5.5 |  |  |  |  |

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- Definition The first set in the series of latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.). + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + 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=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion 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=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600 + Details
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