Notes Payable	9 Months Ended
Jan. 31, 2016
Debt Disclosure [Abstract]
Notes Payable	(5) Notes Payable: Credit Facilities – On June 15, 2015, we entered into a new unsecured credit facility, or the Credit Agreement, with TD Bank, N.A. and other lenders, or the Lenders, which included a $175.0 million revolving line of credit, or the Revolving Line, and a $105.0 million term loan, or the Term Loan, of which $101.9 million remains outstanding as of January 31, 2016. The Revolving Line provides for availability until June 15, 2020 for general corporate purposes, with borrowings to bear interest at a variable rate equal to LIBOR or prime plus an applicable margin based on our consolidated leverage ratio, at our election. As of January 31, 2016, there were no borrowings outstanding on the Revolving Line. Had there been borrowings, they would have borne an interest rate of 3.75% per annum if we had selected the prime rate option and a range of 1.93% to 2.12% per annum if we had selected the LIBOR rate option. The Term Loan, which bears variable interest at rates calculated in the same manner as the Revolving Line, or 1.925% based on the one-month LIBOR rate at January 31, 2016, was entered into for the purpose of redeeming the entire $100.0 million outstanding principal balance of our 5.875% Senior Notes due 2017, or the 5.875% Senior Notes. The Term Loan requires principal payments of $6.3 million per annum plus interest, payable quarterly. Any remaining outstanding amount on the maturity date of June 15, 2020 will be due in full. Concurrent with closing the Term Loan, we redeemed our 5.875% Senior Notes for a $2.9 million call premium, which is included in interest expense, plus accrued and unpaid interest. In connection with the redemption, we expensed $1.7 million of unamortized debt-issuance costs related to our 5.875% Senior Notes, which is included in interest expense in the accompanying consolidated statements of income and comprehensive income. We incurred $1.0 million of debt issuance costs related to our new credit facility, which are included in notes payable in the accompanying consolidated balance sheet. We were required to obtain fixed interest rate protection on the Term Loan covering not less than 75% of the aggregate outstanding principal balance of the Term Loan. Accordingly, on June 18, 2015, we entered into an interest rate swap agreement, which expires on June 15, 2020, that covered 100% of the $105.0 million of floating rate debt. On July 6, 2015, we executed an interest rate swap pursuant to such agreement, which requires us to pay interest at a defined rate of 1.56% while receiving interest at a defined variable rate of one-month LIBOR (0.188% at July 31, 2015). This swap, when combined with the applicable margin based on our consolidated leverage ratio, effectively fixed our interest rate on the Term Loan, which is subject to change based on changes in our consolidated leverage ratio. As of January 31, 2016, our interest rate on the Term Loan is 3.06%. We recognize derivatives as either assets or liabilities on our consolidated balance sheets at fair value. The accounting for changes in the fair value (i.e., unrealized gains or losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and on the type of hedging relationship. Derivatives that do not qualify for hedge accounting must be adjusted to fair value through earnings. Our interest rate swap agreement is considered effective and qualifies as a cash flow hedge. The effective portion of the gain or loss on the derivative that is designated and qualifies as a cash flow hedge is recorded as a component of accumulated other comprehensive income or loss and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. As of January 31, 2016, the interest rate swap was considered effective and had no effect on earnings. The fair value of the interest rate swap on January 31, 2016 was a liability of $1.2 million and was included in other long-term liabilities on our consolidated balance sheet. We do not expect the interest rate swap to have any material effect on earnings within the next 12 months. As of January 31, 2016, the effective interest rate of our Term Loan was 3.06%. 5.000% Senior Notes – During fiscal 2015, we issued an aggregate of $75.0 million of 5.000% Senior Notes due 2018, or the 5.000% Senior Notes, to various institutional investors pursuant to the terms and conditions of an indenture, or the 5.000% Senior Notes Indenture, and purchase agreements. The 5.000% Senior Notes bear interest at a rate of 5.000% per annum payable on January 15 and July 15 of each year, beginning on January 15, 2015. We incurred $2.3 million of debt issuance costs related to the issuance of the 5.000% Senior Notes. At any time prior to July 15, 2016, we may, at our option (a) upon not less than 30 nor more than 60 days’ prior notice, redeem all or a portion of the 5.000% Senior Notes at a redemption price of 100% of the principal amount of the 5.000% Senior Notes, plus an applicable premium, plus accrued and unpaid interest as of the redemption date; or (b) redeem up to 35% of the aggregate principal amount of the 5.000% Senior Notes with the net cash proceeds of one or more equity offerings at a redemption price of 105.000% of the principal amount of the 5.000% Senior Notes, plus accrued and unpaid interest as of the redemption date; provided, that in the case of the foregoing clause, at least 65% of the aggregate original principal amount of the 5.000% Senior Notes remains outstanding, and the redemption occurs within 60 days after the closing of the equity offering. On and after July 15, 2016, we may, at our option, upon not less than 30 nor more than 60 days’ prior notice, redeem all or a portion of the 5.000% Senior Notes at a redemption price of (a) 102.500% of the principal amount of the 5.000% Senior Notes to be redeemed, if redeemed during the 12-month period beginning on July 15, 2016; or (b) 100% of the principal amount of the 5.000% Senior Notes to be redeemed, if redeemed during the 12-month period beginning on July 15, 2017, plus, in either case, accrued and unpaid interest on the 5.000% Senior Notes as of the applicable redemption date. Subject to certain restrictions and conditions, we may be required to make an offer to repurchase the 5.000% Senior Notes from the holders of the 5.000% Senior Notes in connection with a change of control or disposition of assets. If not redeemed by us or repaid pursuant to the holders’ right to require repurchase, the 5.000% Senior Notes mature on July 15, 2018. The 5.000% Senior Notes are general, unsecured obligations of our company. The 5.000% Senior Notes Indenture contains certain affirmative and negative covenants, including limitations on restricted payments (such as share repurchases, dividends, and early payment of indebtedness), limitations on indebtedness, limitations on the sale of assets, and limitations on liens. Payments that would otherwise be characterized as restricted payments are permitted under the 5.000% Senior Notes Indenture in an amount not to exceed 50% of our consolidated net income for the period from the issue date to the date of the restricted payment, provided that at the time of making such payments, (a) no default has occurred or would result from the making of such payments, and (b) we are able to satisfy the debt incurrence test under the 5.000% Senior Notes Indenture, or the 5.000% Senior Notes Lifetime Aggregate Limit. In addition, the 5.000% Senior Notes Indenture provides for other exceptions to the restricted payments covenant, each of which are independent of the 5.000% Senior Notes Lifetime Aggregate Limit. Among such exceptions are (i) the ability to make share repurchases each fiscal year in an amount not to exceed the lesser of (A) $50.0 million in any fiscal year or (B) 75.0% of our consolidated net income for the previous four consecutive published fiscal quarters prior to the date of the determination of such consolidated net income, and (ii) share repurchases over the life of the 5.000% Senior Notes in an aggregate amount not to exceed $75.0 million. The limitation on indebtedness in the 5.000% Senior Notes Indenture is only applicable at such time that the consolidated coverage ratio (as set forth in the 5.000% Senior Notes Indenture) for us and our restricted subsidiaries is less than 3.00 to 1.00. In general, as set forth in the 5.000% Senior Notes Indenture, the consolidated coverage ratio is determined by comparing our prior four quarters’ consolidated EBITDA (earnings before interest, taxes, depreciation, and amortization) to our consolidated interest expense. The Credit Agreement for our credit facility contains financial covenants relating to maintaining maximum leverage and minimum debt service coverage. The 5.000% Senior Notes Indenture contains a financial covenant relating to times interest earned. Letters of Credit – At January 31, 2016, we had outstanding letters of credit under our credit facility aggregating $1.0 million.

(5) Notes Payable:

Credit Facilities – On June 15, 2015, we entered into a new unsecured credit facility, or the Credit Agreement, with TD Bank, N.A. and other lenders, or the Lenders, which included a $175.0 million revolving line of credit, or the Revolving Line, and a $105.0 million term loan, or the Term Loan, of which $101.9 million remains outstanding as of January 31, 2016. The Revolving Line provides for availability until June 15, 2020 for general corporate purposes, with borrowings to bear interest at a variable rate equal to LIBOR or prime plus an applicable margin based on our consolidated leverage ratio, at our election. As of January 31, 2016, there were no borrowings outstanding on the Revolving Line. Had there been borrowings, they would have borne an interest rate of 3.75% per annum if we had selected the prime rate option and a range of 1.93% to 2.12% per annum if we had selected the LIBOR rate option. The Term Loan, which bears variable interest at rates calculated in the same manner as the Revolving Line, or 1.925% based on the one-month LIBOR rate at January 31, 2016, was entered into for the purpose of redeeming the entire $100.0 million outstanding principal balance of our 5.875% Senior Notes due 2017, or the 5.875% Senior Notes. The Term Loan requires principal payments of $6.3 million per annum plus interest, payable quarterly. Any remaining outstanding amount on the maturity date of June 15, 2020 will be due in full. Concurrent with closing the Term Loan, we redeemed our 5.875% Senior Notes for a $2.9 million call premium, which is included in interest expense, plus accrued and unpaid interest. In connection with the redemption, we expensed $1.7 million of unamortized debt-issuance costs related to our 5.875% Senior Notes, which is included in interest expense in the accompanying consolidated statements of income and comprehensive income. We incurred $1.0 million of debt issuance costs related to our new credit facility, which are included in notes payable in the accompanying consolidated balance sheet.

We were required to obtain fixed interest rate protection on the Term Loan covering not less than 75% of the aggregate outstanding principal balance of the Term Loan. Accordingly, on June 18, 2015, we entered into an interest rate swap agreement, which expires on June 15, 2020, that covered 100% of the $105.0 million of floating rate debt. On July 6, 2015, we executed an interest rate swap pursuant to such agreement, which requires us to pay interest at a defined rate of 1.56% while receiving interest at a defined variable rate of one-month LIBOR (0.188% at July 31, 2015). This swap, when combined with the applicable margin based on our consolidated leverage ratio, effectively fixed our interest rate on the Term Loan, which is subject to change based on changes in our consolidated leverage ratio. As of January 31, 2016, our interest rate on the Term Loan is 3.06%.

We recognize derivatives as either assets or liabilities on our consolidated balance sheets at fair value. The accounting for changes in the fair value (i.e., unrealized gains or losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and on the type of hedging relationship. Derivatives that do not qualify for hedge accounting must be adjusted to fair value through earnings. Our interest rate swap agreement is considered effective and qualifies as a cash flow hedge. The effective portion of the gain or loss on the derivative that is designated and qualifies as a cash flow hedge is recorded as a component of accumulated other comprehensive income or loss and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. As of January 31, 2016, the interest rate swap was considered effective and had no effect on earnings. The fair value of the interest rate swap on January 31, 2016 was a liability of $1.2 million and was included in other long-term liabilities on our consolidated balance sheet. We do not expect the interest rate swap to have any material effect on earnings within the next 12 months. As of January 31, 2016, the effective interest rate of our Term Loan was 3.06%.

5.000% Senior Notes – During fiscal 2015, we issued an aggregate of $75.0 million of 5.000% Senior Notes due 2018, or the 5.000% Senior Notes, to various institutional investors pursuant to the terms and conditions of an indenture, or the 5.000% Senior Notes Indenture, and purchase agreements. The 5.000% Senior Notes bear interest at a rate of 5.000% per annum payable on January 15 and July 15 of each year, beginning on January 15, 2015. We incurred $2.3 million of debt issuance costs related to the issuance of the 5.000% Senior Notes.

At any time prior to July 15, 2016, we may, at our option (a) upon not less than 30 nor more than 60 days’ prior notice, redeem all or a portion of the 5.000% Senior Notes at a redemption price of 100% of the principal amount of the 5.000% Senior Notes, plus an applicable premium, plus accrued and unpaid interest as of the redemption date; or (b) redeem up to 35% of the aggregate principal amount of the 5.000% Senior Notes with the net cash proceeds of one or more equity offerings at a redemption price of 105.000% of the principal amount of the 5.000% Senior Notes, plus accrued and unpaid interest as of the redemption date; provided, that in the case of the foregoing clause, at least 65% of the aggregate original principal amount of the 5.000% Senior Notes remains outstanding, and the redemption occurs within 60 days after the closing of the equity offering. On and after July 15, 2016, we may, at our option, upon not less than 30 nor more than 60 days’ prior notice, redeem all or a portion of the 5.000% Senior Notes at a redemption price of (a) 102.500% of the principal amount of the 5.000% Senior Notes to be redeemed, if redeemed during the 12-month period beginning on July 15, 2016; or (b) 100% of the principal amount of the 5.000% Senior Notes to be redeemed, if redeemed during the 12-month period beginning on July 15, 2017, plus, in either case, accrued and unpaid interest on the 5.000% Senior Notes as of the applicable redemption date. Subject to certain restrictions and conditions, we may be required to make an offer to repurchase the 5.000% Senior Notes from the holders of the 5.000% Senior Notes in connection with a change of control or disposition of assets. If not redeemed by us or repaid pursuant to the holders’ right to require repurchase, the 5.000% Senior Notes mature on July 15, 2018.

The 5.000% Senior Notes are general, unsecured obligations of our company. The 5.000% Senior Notes Indenture contains certain affirmative and negative covenants, including limitations on restricted payments (such as share repurchases, dividends, and early payment of indebtedness), limitations on indebtedness, limitations on the sale of assets, and limitations on liens. Payments that would otherwise be characterized as restricted payments are permitted under the 5.000% Senior Notes Indenture in an amount not to exceed 50% of our consolidated net income for the period from the issue date to the date of the restricted payment, provided that at the time of making such payments, (a) no default has occurred or would result from the making of such payments, and (b) we are able to satisfy the debt incurrence test under the 5.000% Senior Notes Indenture, or the 5.000% Senior Notes Lifetime Aggregate Limit. In addition, the 5.000% Senior Notes Indenture provides for other exceptions to the restricted payments covenant, each of which are independent of the 5.000% Senior Notes Lifetime Aggregate Limit. Among such exceptions are (i) the ability to make share repurchases each fiscal year in an amount not to exceed the lesser of (A) $50.0 million in any fiscal year or (B) 75.0% of our consolidated net income for the previous four consecutive published fiscal quarters prior to the date of the determination of such consolidated net income, and (ii) share repurchases over the life of the 5.000% Senior Notes in an aggregate amount not to exceed $75.0 million.

The limitation on indebtedness in the 5.000% Senior Notes Indenture is only applicable at such time that the consolidated coverage ratio (as set forth in the 5.000% Senior Notes Indenture) for us and our restricted subsidiaries is less than 3.00 to 1.00. In general, as set forth in the 5.000% Senior Notes Indenture, the consolidated coverage ratio is determined by comparing our prior four quarters’ consolidated EBITDA (earnings before interest, taxes, depreciation, and amortization) to our consolidated interest expense.

The Credit Agreement for our credit facility contains financial covenants relating to maintaining maximum leverage and minimum debt service coverage. The 5.000% Senior Notes Indenture contains a financial covenant relating to times interest earned.

Letters of Credit – At January 31, 2016, we had outstanding letters of credit under our credit facility aggregating $1.0 million.