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Debt Instrument Maturity Year

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Face Value of Convertible Notes with Accrued Interest

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Line of Credit Facility, Increase in Borrowing Capacity Limit

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Line of Credit Facility, Incremental Term Loan Commitment

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Line of Credit Facility, Remaining Borrowing Capacity, Uncommitted Portion

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Stock Price Upon Issuance Of Convertible Notes

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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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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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization of other deferred costs recognized in the income statement.

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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding.

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Debt - Additional Information (Detail) - USD ($)					12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Jul. 17, 2015	Jun. 05, 2015	Jul. 08, 2014	May 28, 2008	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Jun. 08, 2015	Apr. 23, 2015	Dec. 28, 2014
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Current					$ 0	$ 0
Company owned capital stock percentage					65.00%
Stock Price Upon Issuance Of Convertible Notes				$ 30.19
Short term borrowing outstanding amount					$ 18,359,000	$ 22,144,000
Short-term debt, weighted-average interest rates					7.00%	8.00%
Deferred financing fees, net of accumulated amortization					$ 4,891,000	$ 6,279,000
Amortization expense included in interest expense					1,388,000	$ 1,464,000	$ 1,263,000
Face Value of Convertible Notes with Accrued Interest								$ 1,000.66
Shares issued from treasury stock to settle conversion premium on Convertible Notes	1,889,431					1,889,431
Debt Instrument, Convertible, Percent of Holders that Exercised Conversion Rights		99.00%
Repayments of Convertible Debt	$ 172,388,000				0	$ 172,266,000	234,000
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt					$ 84,140,000	84,140,000
2011 Credit Facility Due 2018
Debt Instrument [Line Items]
Debt instrument maturity year					2018
Convertible Notes Payable
Debt Instrument [Line Items]
Face value of debt instrument				$ 172,500,000
Interest rate of debt instrument				3.375%
Amount of interest cost recognized for the amortization of the discount					$ 0	1,330,000	8,283,000
Stand by letters of credit					2,189,000	2,693,000
Available lines of credit					475,947,000	472,187,000
Line of Credit Facility, Remaining Borrowing Capacity, Uncommitted Portion					$ 142,872,000	144,112,000
Senior Unsecured 5.00% Due 2023
Debt Instrument [Line Items]
Long-term debt									$ 300,000,000
Interest rate of debt instrument									5.00%
Senior Unsecured 3.375% Convertible Notes Due 2038
Debt Instrument [Line Items]
Interest rate of debt instrument					3.375%				3.375%
Debt instrument maturity year					2038
Interest paid					$ 20,781,000	15,176,000	$ 10,088,000
Revolving Credit Facility [Member] \| 2011 Credit Facility Due 2018
Debt Instrument [Line Items]
Long-term debt										$ 165,000,000
Incremental Commitment Agreement [Member] \| Revolving Commitments and/or Term Loans [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Increase in Borrowing Capacity Limit			$ 300,000,000
Incremental Commitment Agreement [Member] \| Secured Debt [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Incremental Term Loan Commitment			150,000,000							$ 127,500,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months					15,000,000
Incremental Commitment Agreement [Member] \| Secured Debt [Member] \| 2011 Credit Facility Due 2018
Debt Instrument [Line Items]
Maximum borrowing capacity			500,000,000
Line of Credit Facility, Incremental Term Loan Commitment					$ 292,500,000	$ 312,500,000
Debt Instrument Quarterly Installments Beginning June 30, 2014 through June 30, 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment			1,875,000
Debt Instrument Quarterly Installments Beginning June 30, 2016 through September 30, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment			3,750,000
Debt Instrument Final Installments Payable on September 30, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment			$ 108,750,000
London Interbank Offered Rate (LIBOR) [Member] \| Incremental Commitment Agreement [Member] \| Revolving Commitments and/or Term Loans [Member]
Debt Instrument [Line Items]
Interest at a floating rate					1.25%
London Interbank Offered Rate (LIBOR) [Member] \| Incremental Commitment Agreement [Member] \| Revolving Commitments and/or Term Loans [Member] \| Minimum
Debt Instrument [Line Items]
Interest at a floating rate			1.25%
London Interbank Offered Rate (LIBOR) [Member] \| Incremental Commitment Agreement [Member] \| Revolving Commitments and/or Term Loans [Member] \| Maximum
Debt Instrument [Line Items]
Interest at a floating rate			1.75%
Higher of Bank of America Prime Rate or Federal Funds Effective Rate [Member] \| Incremental Commitment Agreement [Member] \| Revolving Commitments and/or Term Loans [Member] \| Minimum
Debt Instrument [Line Items]
Interest at a floating rate			0.25%
Higher of Bank of America Prime Rate or Federal Funds Effective Rate [Member] \| Incremental Commitment Agreement [Member] \| Revolving Commitments and/or Term Loans [Member] \| Maximum
Debt Instrument [Line Items]
Interest at a floating rate			0.75%