Company owned capital stock percentage securing senior secured credit facility

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Line of Credit Facility, Increase in Borrowing Capacity Limit

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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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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Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

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Amount of the required periodic payments including both interest and principal payments.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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- Definition

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, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. 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 amortization of other deferred costs recognized in the income statement.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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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 calculated at point in time.

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Debt - (Additional Information) (Details)			3 Months Ended		6 Months Ended
Debt - (Additional Information) (Details)	Dec. 11, 2019 USD ($)	Aug. 04, 2017 USD ($)	Oct. 04, 2020 USD ($)	Sep. 30, 2019 USD ($)	Oct. 04, 2020 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)	Dec. 28, 2019	Mar. 31, 2019 USD ($)	Mar. 31, 2019 CAD ($)	Apr. 23, 2015 USD ($)
Debt Instrument [Line Items]
Increase in borrowing capacity limit		$ 325,000,000
Company owned capital stock, percentage securing senior secured credit facility		65.00%
Short-term debt			$ 31,813,000		$ 31,813,000		$ 46,544,000
Short-term debt, weighted average interest rate			2.00%		2.00%		3.00%
Amortization expense relating to debt issuance costs and included in interest expense			$ 518,000	$ 374,000	$ 1,036,000	$ 752,000
Deferred issuance costs, net of accumulated amortization			7,457,000		7,457,000		$ 8,493,000
4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Long-term debt	$ 300,000,000		$ 300,000,000		$ 300,000,000
Interest rate	4.375%		4.375%		4.375%
Proceeds from issuance of debt, net of debt issuance costs	$ 296,250,000
5.00% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt			$ 300,000,000		$ 300,000,000						$ 300,000,000
Interest rate			5.00%		5.00%						5.00%
Standby Letters of Credit
Debt Instrument [Line Items]
Available lines of credit			$ 765,768,000		$ 765,768,000		693,640,000
Stand by letters of credit			7,720,000		7,720,000		7,720,000
Outstanding amount			123,074,000		123,074,000		$ 105,946,000
Maximum
Debt Instrument [Line Items]
Consideration transferred					250,000
Amended Credit Facility, due 2022 \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 600,000,000							$ 100,000,000
Available lines of credit			53,000,000		53,000,000
Amended Credit Facility, due 2022 \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									299,105,000
Debt instrument, face amount		$ 150,000,000
Available lines of credit			393,665,000		393,665,000
Current portion of long-term debt			$ 44,990,000		$ 44,990,000
Amended 2017 Term Loan \| Term Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									99,105,000
Amended 2017 Term Loan \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									449,105,000	$ 133,050,000
Amended 2017 Revolver \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									$ 700,000,000
LIBOR \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%
LIBOR \| 2017 Revolver And 2017 Term Loan \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
LIBOR \| 2017 Revolver And 2017 Term Loan \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Federal Funds Effective Rate \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Eurocurrency Base Rate \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
CDOR \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Debt Instrument Quarterly Installments Beginning December 31, 2018 Through December 30, 2019
Debt Instrument [Line Items]
Debt instrument, periodic payment		$ 5,645,000
Debt Instrument Quarterly Installments Beginning December 31, 2019 Through December 30, 2020
Debt Instrument [Line Items]
Debt instrument, periodic payment		8,468,000
Debt Instrument Quarterly Installments Beginning December 31, 2020 Through September 29, 2022
Debt Instrument [Line Items]
Debt instrument, periodic payment		11,290,000
Debt Instrument Final Installments Payable On September 30, 2022
Debt Instrument [Line Items]
Debt instrument, periodic payment		$ 320,000,000
Maximum Leverage Ratio
Debt Instrument [Line Items]
Measurement input			3.50		3.50			4.00
Maximum Leverage Ratio \| Minimum
Debt Instrument [Line Items]
Measurement input			3.50		3.50
Maximum Leverage Ratio \| Maximum
Debt Instrument [Line Items]
Measurement input			4.00		4.00
Prior to September 15, 2027 \| 4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Redemption percentage					100.00%
On or after September 15, 2027 \| 4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Redemption percentage					100.00%
Change of control triggering event \| 4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Redemption percentage					101.00%