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v3.3.1.900

Notes Payable - Additional Information (Detail) - USD ($) | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2016 | Apr. 30, 2015 | Jul. 31, 2015 | Jul. 06, 2015 | Jun. 18, 2015 | Jun. 15, 2015
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility, maturity | Jun. 15, 2020 |  |  |  |  |
Interest description of revolving line of credit | 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. |  |  |  |  |
Percentage of interest rate protection on term loan |  |  |  |  | 75.00% |
Fair value of the interest rate swap liability | $ 1,200,000 |  |  |  |  |
Senior Notes Indenture, number of shares allowed for repurchase | $ 50,000,000 |  |  |  |  |
Maximum consolidated coverage ratio | 300.00% |  |  |  |  |
Minimum consolidated coverage ratio | 100.00% |  |  |  |  |
Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Outstanding debt | $ 101,900,000 |  |  |  |  | $ 105,000,000
Principal payments per annum | 6,300,000 |  |  |  |  |
Debt Issuance Cost | $ 1,000,000 |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage | 3.06% |  |  |  |  |
5.875% Senior notes due 2017 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Outstanding debt | $ 100,000,000 |  |  |  |  |
Debt instrument, interest rate | 5.875% |  |  |  |  |
Debt instrument call premium value | $ 2,900,000 |  |  |  |  |
Unamortized debt-issuance costs | $ 1,700,000 |  |  |  |  |
5.000% Senior Notes due 2018 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, interest rate | 5.00% | 5.00% |  |  |  |
Debt Issuance Cost |  | $ 2,300,000 |  |  |  |
Notes issued |  | $ 75,000,000 |  |  |  |
Debt Instrument Maturity Date | Jul. 15, 2018 |  |  |  |  |
Senior Notes Indenture, maximum number of shares allowed for repurchase as a percentage of Consolidated net income for previous four consecutive published fiscal quarters | 75.00% |  |  |  |  |
5.000% Senior Notes due 2018 | Debt Instrument, Redemption, Period One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Description of redemption for senior notes | (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. |  |  |  |  |
5.000% Senior Notes due 2018 | Debt Instrument, Redemption, Period One | Debt Instrument Redemption Scenario One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Redemption price of senior notes | 100.00% |  |  |  |  |
Percentage of principal amount that remains outstanding | 65.00% |  |  |  |  |
5.000% Senior Notes due 2018 | Debt Instrument, Redemption, Period One | Debt Instrument Redemption Scenario Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Redemption price of senior notes | 105.00% |  |  |  |  |
Percentage of redeem notes | 35.00% |  |  |  |  |
5.000% Senior Notes due 2018 | Debt Instrument, Redemption, Period Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Description of redemption for senior notes | 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 |  |  |  |  |
5.000% Senior Notes due 2018 | Debt Instrument, Redemption, Period Two | Debt Instrument Redemption Scenario One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Redemption price of senior notes | 102.50% |  |  |  |  |
5.000% Senior Notes due 2018 | Debt Instrument, Redemption, Period Two | Debt Instrument Redemption Scenario Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Redemption price of senior notes | 100.00% |  |  |  |  |
5.000% Senior Notes due 2018 | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes Indenture, number of shares allowed for repurchase | $ 50,000,000 |  |  |  |  |
5.000% Senior Notes due 2018 | Minimum | Debt Instrument, Redemption, Period One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notice period of senior notes | 30 days |  |  |  |  |
5.000% Senior Notes due 2018 | Minimum | Debt Instrument, Redemption, Period Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notice period of senior notes | 30 days |  |  |  |  |
5.000% Senior Notes due 2018 | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes Indenture, number of shares allowed for repurchase | $ 75,000,000 |  |  |  |  |
5.000% Senior Notes due 2018 | Maximum | Debt Instrument, Redemption, Period One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notice period of senior notes | 60 days |  |  |  |  |
5.000% Senior Notes due 2018 | Maximum | Debt Instrument, Redemption, Period Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notice period of senior notes | 60 days |  |  |  |  |
Unsecured Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility, borrowing capacity |  |  |  |  |  | $ 175,000,000
Credit Facilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Borrowings outstanding | $ 0 |  |  |  |  |
Outstanding letters of credit | $ 1,000,000 |  |  |  |  |
Prime Rate Option | Credit Facilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on borrowings | 3.75% |  |  |  |  |
LIBOR Rate Option | Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on borrowings | 1.925% |  |  |  |  |
LIBOR Rate Option | Credit Facilities | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on borrowings | 1.93% |  |  |  |  |
LIBOR Rate Option | Credit Facilities | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate on borrowings | 2.12% |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percentage of floating rate debt covered |  |  |  |  | 100.00% |
Derivative, Notional Amount |  |  |  |  | $ 105,000,000 |
Derivative, Maturity Date | Jun. 15, 2020 |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  | 1.56% |  |
Derivative, Variable Interest Rate Of one-month LIBOR |  |  | 0.188% |  |  |

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