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Long-Term Debt - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Apr. 30, 2013
|
Apr. 30, 2013
Minimum
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Apr. 30, 2013
Maximum
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Apr. 30, 2013
Standby Letters of Credit
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Apr. 30, 2012
Standby Letters of Credit
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Apr. 30, 2013
Federal Funds Rate
|
Apr. 30, 2013
One Month LIBOR
|
Apr. 30, 2013
LIBOR Loans
Minimum
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Apr. 30, 2013
LIBOR Loans
Maximum
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Apr. 30, 2013
Base Rate Loans
Minimum
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Apr. 30, 2013
Base Rate Loans
Maximum
|
Apr. 30, 2013
Csv Of Coli Contracts
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Apr. 30, 2012
Csv Of Coli Contracts
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Apr. 30, 2013
Csv Of Coli Contracts
Minimum
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Apr. 30, 2013
Csv Of Coli Contracts
Maximum
|
Apr. 30, 2013
Revolving Credit Facility
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Apr. 30, 2013
Revolving Credit Facility
Letter of Credit
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| Debt Instrument [Line Items] | |||||||||||||||||
| Senior Unsecured Revolving Facility, aggregate availability | $ 75.0 | ||||||||||||||||
| Senior Unsecured Revolving Facility, additional borrowing capacity | 50.0 | 15.0 | |||||||||||||||
| Senior Unsecured Revolving Facility, maturity date | Jan. 18, 2018 | ||||||||||||||||
| Applicable margin on variable interest rate | 1.50% | 1.50% | 0.50% | 1.50% | 0.00% | 0.25% | |||||||||||
| Quarterly Commitment Fees on the Facility's unused commitments | 0.25% | 0.35% | |||||||||||||||
| Financial covenants amount | 50.0 | ||||||||||||||||
| Interest rate description | Borrowings under the Facility bear interest, at the election of the Company, at the London Interbank Offered Rate (“LIBOR”) plus the applicable margin or the base rate plus the applicable margin. The base rate is the highest of (i) the published prime rate, (ii) the federal funds rate plus 1.50%, or (iii) one month LIBOR plus 1.50%. The applicable margin is based on a percentage per annum determined in accordance with a specified pricing grid based on the total funded debt to adjusted EBITDA ratio. For LIBOR loans, the applicable margin will range from 0.50% to 1.50% per annum, while for base rate loans the applicable margin will range from 0.00% to 0.25% per annum. The Company is required to pay a quarterly commitment fee of 0.25% to 0.35% on the Facility’s unused commitments based on the Company’s funded debt to adjusted EBITDA ratio. | ||||||||||||||||
| Covenant description | The financial covenants include a maximum consolidated funded debt to adjusted EBITDA ratio and a minimum adjusted EBITDA. As of April 30, 2013, the Company is in compliance with its financial covenants. In addition, there is a domestic liquidity requirement that the Company maintain $50.0 million in unrestricted cash and/or marketable securities (excluding any marketable securities that are held in trust for the settlement of the Company’s obligation under certain deferred compensation plans) as a condition to consummating permitted acquisitions, paying dividends to our shareholders and share repurchases of our common stock. | ||||||||||||||||
| Previous Facility, standby letters of credit | 2.7 | 2.9 | |||||||||||||||
| Previous Facility, restricted cash | 2.9 | 10.0 | |||||||||||||||
| Outstanding policy loans | $ 73.3 | $ 73.3 | |||||||||||||||
| Interest payable fixed and variable rates | 4.76% | 8.00% | |||||||||||||||