Loans Payable and Long-Term Debt	9 Months Ended
Jan. 31, 2019
Debt Disclosure [Abstract]
Loans Payable and Long-Term Debt	Loans Payable and Long-Term Debt On December 29, 2017, the Company entered into the Credit Agreement, which provides for the Revolving Facility, the Initial Term Loan and the Delayed Draw Term Loan. Also on December 29, 2017, the Company borrowed the entire $250 million available under the Initial Term Loan and approximately $50 million under the Revolving Facility to fund, in part, the cash portion of the RSI Acquisition consideration and the Company’s transaction fees and expenses related to the RSI Acquisition. On February 12, 2018, the Company borrowed the entire $250 million under the Delayed Draw Term in connection with the refinancing of the RSI Notes and to repay, in part, amounts outstanding under the Revolving Facility. In connection with its entry into the Credit Agreement, the Company terminated its prior $35 million revolving credit facility with Wells Fargo. The Company is required to make specified quarterly installments on both the Initial Term Loan and the Delayed Draw Loan. As of January 31, 2019, $180.5 million remained outstanding on each of the Initial Term Loan and the Delayed Draw Loan, which approximate fair value, and no amount was outstanding on the Revolving Facility. The Credit Facilities mature on December 29, 2022. Amounts outstanding under the Credit Facilities bear interest based on a fluctuating rate measured by reference to either, at the Company’s option, a base rate plus an applicable margin or LIBOR plus an applicable margin, with the applicable margin being determined by reference to the Company’s then-current “Total Funded Debt to EBITDA Ratio.” The Company also incurs a quarterly commitment fee on the average daily unused portion of the Revolving Facility during the applicable quarter at a rate per annum also determined by reference to the Company’s then-current “Total Funded Debt to EBITDA Ratio.” In addition, a letter of credit fee will accrue on the face amount of any outstanding letters of credit at a per annum rate equal to the applicable margin on LIBOR loans, payable quarterly in arrears. On January 25, 2019, the Company entered into an amendment to the Credit Agreement (the “Amendment”) that reduced the applicable margin for both LIBOR rate and base rate loans and reduced the commitment fee incurred on unused portions of the Revolving Facility. The Credit Agreement includes certain financial covenants. The Amendment amended these covenants by (i) removing the requirement to maintain a “Total Secured Debt to EBITDA Ratio” of no more than 2.50 to 1.00 and (ii) setting a maximum “Total Funded Debt to EBITDA Ratio” as of the last day of any fiscal quarter ending through January 31, 2020 of no more than 3.50 to 1.00 and thereafter, of no more than 3.25 to 1.00 (with an increase to 3.75 to 1.00 for a certain period upon the consummation of a “Qualified Acquisition”). The maximum Total Funded Debt to EBITDA Ratio applicable prior to the Amendment was 3.75 to 1.00, which was scheduled, prior to the Amendment, to decrease to 3.50 to 1.00 beginning April 30, 2019 and to 3.25 to 1.00 beginning April 30, 2020. The Credit Agreement includes certain additional covenants, including negative covenants that restrict the ability of the Company and certain of its subsidiaries to incur additional indebtedness, create additional liens on its assets, dispose of its assets or engage in a merger or another similar transaction or engage in transactions with affiliates, subject, in each case, to the various exceptions and conditions described in the Credit Agreement. The negative covenants further restrict the Company’s ability to make certain restricted payments, including the payment of dividends and repurchase of common stock, in certain limited circumstances. In September 2018, the Company entered into an amendment to the Credit Agreement that amended the restricted payments covenant to (i) permit unlimited restricted payments so long as the “Total Funded Debt to EBITDA Ratio” would be less than or equal to 2.50 to 1.00 after giving effect to any such payment and no default or event of default has occurred and is continuing or would result from any such payment and (ii) permit up to an aggregate of $50 million in restricted payments not otherwise permitted under the Credit Agreement so long as no default or event of default has occurred and is continuing or would result from any such payment. The Amendment further amended the restricted payments covenant to increase the “Total Funded Debt to EBITDA Ratio” applicable to the exception permitting unlimited restricted payments discussed above to 2.75 to 1.00. The negative covenants in the Credit Agreement also include a covenant restricting the Company’s ability to make certain investments. Prior to the Amendment, the Credit Agreement included an exception to this covenant for investments in an aggregate amount not to exceed the “Cumulative Credit” so long as the Total Funded Debt to EBITDA Ratio was less than or equal to 3.00 to 1.00 after giving effect to any such investment and no default or event of default had occurred and was continuing or would result from any such investment. The Amendment removes the Cumulative Credit cap from this exception such that the Company may make unlimited investments so long as the Total Funded Debt to EBITDA Ratio and the absence of a default or event of default conditions noted in the prior sentence are satisfied. As of January 31, 2019, the Company was in compliance with the covenants included in the Credit Agreement. The Company’s obligations under the Credit Agreement are guaranteed by the Company’s subsidiaries and the obligations of the Company and its subsidiaries are secured by a pledge of substantially all of their respective personal property. On February 12, 2018, the Company issued $350 million in aggregate principal amount of 4.875% Senior Notes due 2026 (the “Senior Notes”). The Senior Notes mature on March 15, 2026 and interest on the Senior Notes is payable semi-annually in arrears on March 15 and September 15 of each year, which payments began on September 15, 2018. The Senior Notes are, and will be, fully and unconditionally guaranteed by each of the Company’s current and future wholly-owned domestic subsidiaries that guarantee the Company’s obligations under the Credit Agreement. The indenture governing the Senior Notes restricts the ability of the Company and the Company’s “restricted subsidiaries” to, as applicable, (i) incur additional indebtedness or issue certain preferred shares, (ii) create liens, (iii) pay dividends, redeem or repurchase stock or make other distributions or restricted payments, (iv) make certain investments, (v) create restrictions on the ability of the “restricted subsidiaries” to pay dividends to the Company or make other intercompany transfers, (vi) transfer or sell assets, (vii) merge or consolidate with a third party and (viii) enter into certain transactions with affiliates of the Company, subject, in each case, to certain qualifications and exceptions as described in the indenture. As of January 31, 2019, the Company and its restricted subsidiaries were in compliance with all covenants under the indenture governing the Senior Notes. At January 31, 2019, the book value of the Senior Notes was $350 million and the fair value was $325 million, based on Level 2 inputs. Economic Development Loans In 2005, the Company entered into two separate loan agreements with the Maryland Economic Development Corporation and the County Commissioners of Allegany County as part of the Company’s capital investment and operations at the Allegany County, Maryland site. The aggregate balance of these loan agreements was $2.2 million as of April 30, 2018. The loan agreements expired at December 31, 2018. Based on the employment levels maintained and the terms of the loan agreements, the Company expects that $2.1 million of aggregate principal and $0.9 million of accrued interest will be forgiven and has derecognized these liabilities into income. The Company expects to repay $0.1 million before the end of fiscal year 2019. The Company had two loan agreements with the West Virginia Economic Development Authority as part of the Company’s capital investment and operations at the South Branch plan located in Hardy County, West Virginia. The loans expired on December 31, 2018 and aggregate principal of $2.3 million and accrued interest of $0.2 million was forgiven as the Company complied with certain employment levels at the facility.

Loans Payable and Long-Term Debt

On December 29, 2017, the Company entered into the Credit Agreement, which provides for the Revolving Facility, the Initial Term Loan and the Delayed Draw Term Loan. Also on December 29, 2017, the Company borrowed the entire $250 million available under the Initial Term Loan and approximately $50 million under the Revolving Facility to fund, in part, the cash portion of the RSI Acquisition consideration and the Company’s transaction fees and expenses related to the RSI Acquisition. On February 12, 2018, the Company borrowed the entire $250 million under the Delayed Draw Term in connection with the refinancing of the RSI Notes and to repay, in part, amounts outstanding under the Revolving Facility. In connection with its entry into the Credit Agreement, the Company terminated its prior $35 million revolving credit facility with Wells Fargo. The Company is required to make specified quarterly installments on both the Initial Term Loan and the Delayed Draw Loan. As of January 31, 2019, $180.5 million remained outstanding on each of the Initial Term Loan and the Delayed Draw Loan, which approximate fair value, and no amount was outstanding on the Revolving Facility. The Credit Facilities mature on December 29, 2022.

Amounts outstanding under the Credit Facilities bear interest based on a fluctuating rate measured by reference to either, at the Company’s option, a base rate plus an applicable margin or LIBOR plus an applicable margin, with the applicable margin being determined by reference to the Company’s then-current “Total Funded Debt to EBITDA Ratio.” The Company also incurs a quarterly commitment fee on the average daily unused portion of the Revolving Facility during the applicable quarter at a rate per annum also determined by reference to the Company’s then-current “Total Funded Debt to EBITDA Ratio.” In addition, a letter of credit fee will accrue on the face amount of any outstanding letters of credit at a per annum rate equal to the applicable margin on LIBOR loans, payable quarterly in arrears. On January 25, 2019, the Company entered into an amendment to the Credit Agreement (the “Amendment”) that reduced the applicable margin for both LIBOR rate and base rate loans and reduced the commitment fee incurred on unused portions of the Revolving Facility.

The Credit Agreement includes certain financial covenants. The Amendment amended these covenants by (i) removing the requirement to maintain a “Total Secured Debt to EBITDA Ratio” of no more than 2.50 to 1.00 and (ii) setting a maximum “Total Funded Debt to EBITDA Ratio” as of the last day of any fiscal quarter ending through January 31, 2020 of no more than 3.50 to 1.00 and thereafter, of no more than 3.25 to 1.00 (with an increase to 3.75 to 1.00 for a certain period upon the consummation of a “Qualified Acquisition”). The maximum Total Funded Debt to EBITDA Ratio applicable prior to the Amendment was 3.75 to 1.00, which was scheduled, prior to the Amendment, to decrease to 3.50 to 1.00 beginning April 30, 2019 and to 3.25 to 1.00 beginning April 30, 2020.

The Credit Agreement includes certain additional covenants, including negative covenants that restrict the ability of the Company and certain of its subsidiaries to incur additional indebtedness, create additional liens on its assets, dispose of its assets or engage in a merger or another similar transaction or engage in transactions with affiliates, subject, in each case, to the various exceptions and conditions described in the Credit Agreement. The negative covenants further restrict the Company’s ability to make certain restricted payments, including the payment of dividends and repurchase of common stock, in certain limited circumstances. In September 2018, the Company entered into an amendment to the Credit Agreement that amended the restricted payments covenant to (i) permit unlimited restricted payments so long as the “Total Funded Debt to EBITDA Ratio” would be less than or equal to 2.50 to 1.00 after giving effect to any such payment and no default or event of default has occurred and is continuing or would result from any such payment and (ii) permit up to an aggregate of $50 million in restricted payments not otherwise permitted under the Credit Agreement so long as no default or event of default has occurred and is continuing or would result from any such payment. The Amendment further amended the restricted payments covenant to increase the “Total Funded Debt to EBITDA Ratio” applicable to the exception permitting unlimited restricted payments discussed above to 2.75 to 1.00. The negative covenants in the Credit Agreement also include a covenant restricting the Company’s ability to make certain investments. Prior to the Amendment, the Credit Agreement included an exception to this covenant for investments in an aggregate amount not to exceed the “Cumulative Credit” so long as the Total Funded Debt to EBITDA Ratio was less than or equal to 3.00 to 1.00 after giving effect to any such investment and no default or event of default had occurred and was continuing or would result from any such investment. The Amendment removes the Cumulative Credit cap from this exception such that the Company may make unlimited investments so long as the Total Funded Debt to EBITDA Ratio and the absence of a default or event of default conditions noted in the prior sentence are satisfied.

As of January 31, 2019, the Company was in compliance with the covenants included in the Credit Agreement.

The Company’s obligations under the Credit Agreement are guaranteed by the Company’s subsidiaries and the obligations of the Company and its subsidiaries are secured by a pledge of substantially all of their respective personal property.

On February 12, 2018, the Company issued $350 million in aggregate principal amount of 4.875% Senior Notes due 2026 (the “Senior Notes”). The Senior Notes mature on March 15, 2026 and interest on the Senior Notes is payable semi-annually in arrears on March 15 and September 15 of each year, which payments began on September 15, 2018. The Senior Notes are, and will be, fully and unconditionally guaranteed by each of the Company’s current and future wholly-owned domestic subsidiaries that guarantee the Company’s obligations under the Credit Agreement. The indenture governing the Senior Notes restricts the ability of the Company and the Company’s “restricted subsidiaries” to, as applicable, (i) incur additional indebtedness or issue certain preferred shares, (ii) create liens, (iii) pay dividends, redeem or repurchase stock or make other distributions or restricted payments, (iv) make certain investments, (v) create restrictions on the ability of the “restricted subsidiaries” to pay dividends to the Company or make other intercompany transfers, (vi) transfer or sell assets, (vii) merge or consolidate with a third party and (viii) enter into certain transactions with affiliates of the Company, subject, in each case, to certain qualifications and exceptions as described in the indenture. As of January 31, 2019, the Company and its restricted subsidiaries were in compliance with all covenants under the indenture governing the Senior Notes.

At January 31, 2019, the book value of the Senior Notes was $350 million and the fair value was $325 million, based on Level 2 inputs.

Economic Development Loans

In 2005, the Company entered into two separate loan agreements with the Maryland Economic Development Corporation and the County Commissioners of Allegany County as part of the Company’s capital investment and operations at the Allegany County, Maryland site. The aggregate balance of these loan agreements was $2.2 million as of April 30, 2018. The loan agreements expired at December 31, 2018. Based on the employment levels maintained and the terms of the loan agreements, the Company expects that $2.1 million of aggregate principal and $0.9 million of accrued interest will be forgiven and has derecognized these liabilities into income. The Company expects to repay $0.1 million before the end of fiscal year 2019.

The Company had two loan agreements with the West Virginia Economic Development Authority as part of the Company’s capital investment and operations at the South Branch plan located in Hardy County, West Virginia. The loans expired on December 31, 2018 and aggregate principal of $2.3 million and accrued interest of $0.2 million was forgiven as the Company complied with certain employment levels at the facility.