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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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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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No definition available.

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Amount of the required periodic payments including both interest and principal payments.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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No definition available.

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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.

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

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

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No definition available.

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The carrying value as of the balance sheet date of the current 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.

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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.

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DEBT - PNC Bank and Cerberus Credit Facility (Details) - USD ($)				12 Months Ended
	Apr. 30, 2019	Dec. 15, 2017	Jun. 30, 2014	Jul. 31, 2019	Jul. 31, 2018
Debt Instrument [Line Items]
Proceeds from long-term debt				$ 0	$ 393,000,000
Aggregate amount of each consecutive quarterly scheduled principal installment		$ 1,500,000
Excess cash flow payments				8,900,000
Revolving credit facility				6,000,000	0
Current and long-term net				387,669,000	453,368,000
PNC Bank Credit Facility
Debt Instrument [Line Items]
Line of credit facility, term			5 years
Line of credit facility, maximum credit commitment	$ 25,000,000		$ 50,000,000
Line of credit facility, unutilized commitment fee percentage	0.25%
Credit facility, readily available borrowing capacity				13,800,000
Long-term line of credit				$ 0	$ 0
PNC Bank Credit Facility \| Letter of Credit Sublimit
Debt Instrument [Line Items]
Line of credit facility, maximum credit commitment	$ 5,000,000
PNC Bank Credit Facility \| Scenario 1 \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate	2.25%
PNC Bank Credit Facility \| Scenario 2 \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate	1.00%
PNC Bank Credit Facility \| Scenario 2 \| Federal Funds Open Rate
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate	0.50%
Cerberus Credit Facility
Debt Instrument [Line Items]
Line of credit facility, term		5 years
Proceeds from long-term debt		$ 393,000,000
Revolving credit facility		$ 25,000,000
Excess cash flow payment percentage					50.00%
Leverage ratio				3.50%
Cerberus Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate		6.50%
Cerberus Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate		3.75%
Cerberus Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum credit commitment				$ 19,000,000
Revolving credit facility				6,000,000	$ 0
Cerberus Credit Facility \| Term Loan
Debt Instrument [Line Items]
Principal amount outstanding on the Term Loan				375,125,000	390,000,000
Current and long-term net				$ 374,237,000	$ 388,838,000
Rate Applicable When Leverage Ratio is Below 3.50 \| Cerberus Credit Facility
Debt Instrument [Line Items]
Excess cash flow payment percentage				25.00%