Amount of line note available to purchase common stock in open market.

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Debt Instrument, Issuance Price, Percentage

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Debt Instrument, Number of Loans

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Debt Instrument, Number of Loans Refinanced with New Debt Instrument

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Lessee, Finance Lease, Number Of Options to Extend

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Line Of Credit Facility, Maximum Borrowing Capacity Increase Decrease

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Amount of long term capitalized fees and expenses.

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Maximum percentage of equity interest of subsidiaries borrowings guaranteed.

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Number of properties refinanced.

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Share based compensation arrangement by share based payment award shares purchased for award value.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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Amount of the required periodic payments applied to principal.

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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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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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Weighted average purchase price of capital shares purchased through an employee stock ownership plan.

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No definition available.

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Term of lessee's finance lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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The effective interest rate at the end of the reporting period.

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The effective interest rate during the reporting period.

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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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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The carrying value as of the balance sheet date of the noncurrent portion 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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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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LONG-TERM DEBT (Details) - Narrative $ / shares in Units, $ in Thousands						1 Months Ended								3 Months Ended						6 Months Ended		12 Months Ended
	Apr. 16, 2018 USD ($) $ / shares	Mar. 07, 2018 $ / shares	Oct. 02, 2017 USD ($)	Oct. 01, 2016 USD ($)	Mar. 22, 2016 USD ($)	Mar. 31, 2019 AUD ($)	Mar. 31, 2019 USD ($)	Jul. 31, 2018 GBP (£)	Sep. 30, 2017 AUD ($)	Mar. 31, 2017 AUD ($)	Aug. 31, 2016 USD ($)	Jul. 31, 2016 USD ($)	Nov. 30, 2012 CAD ($)	Mar. 31, 2019 GBP (£) $ / shares	Dec. 31, 2018 $ / shares	Sep. 30, 2018 USD ($) $ / shares	Jun. 30, 2018 $ / shares	Mar. 31, 2018 $ / shares	Dec. 31, 2017 $ / shares	Mar. 31, 2019 USD ($) option $ / shares	Mar. 31, 2018 $ / shares	Sep. 30, 2018 USD ($) $ / shares	Sep. 30, 2017 USD ($) $ / shares shares	Mar. 31, 2019 AUD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 CAD ($)	Dec. 31, 2016 AUD ($)	Jul. 31, 2016 AUD ($) loan	May 18, 2016 USD ($)	Mar. 31, 2016 USD ($) property	Sep. 30, 2015 USD ($)	Feb. 27, 2014 USD ($)	Feb. 14, 2014 USD ($)
Debt Instrument [Line Items]
Face amount																														$ 8,000,000	$ 32,280,000
Long-term debt																$ 1,121,082,000						$ 1,121,082,000			$ 1,217,002,000
Capitalized Fees & Expenses																$ 14,830,000						$ 14,830,000			13,025,000
Maximum percentage of equity interest of subsidiaries borrowings guaranteed																				65.00%
Long-term line of credit																									$ 16,081,000
Number of properties refinanced \| property																														4
Basis spread on variable rate													1.30%
Stock issued during period, shares, employee stock ownership plan (in shares) \| shares																							621,875
Shares purchased for award value																							$ 10,908,000
Weighted average purchase price of shares purchased (in dollars per share) \| $ / shares																							$ 17.54
Dividends paid per common share (in dollars per share) \| $ / shares		$ 1.00												$ 0.0725	$ 0.0725	$ 0.07	$ 0.07	$ 0.0700	$ 0.07	$ 0.145	$ 0.1400	$ 0.28
Troy, Ohio [Member]
Debt Instrument [Line Items]
Percentage bearing fixed interest, percentage rate														5.00%										5.00%	5.00%	5.00%
Ocala, Florida [Member]
Debt Instrument [Line Items]
Percentage bearing fixed interest, percentage rate														8.00%										8.00%	8.00%	8.00%
Number of option to extend \| option																				2
Lease renewal term														5 years										5 years	5 years	5 years
Special Dividends [Member]
Debt Instrument [Line Items]
Dividends paid per common share (in dollars per share) \| $ / shares	$ 1.00
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate								1.80%
Libor Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate during period					2.75%
Revolver due 2019 [Member]
Debt Instrument [Line Items]
Long-term line of credit																									$ 157,936,000
Remaining borrowing capacity																									$ 175,983,000
Revolver due 2019 [Member] \| Letter Of Credit Subfacility [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity					$ 50,000,000
Revolver due 2019 [Member] \| Multicurrency Subfacility [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity					$ 100,000,000
Revolver due 2019 [Member] \| Margin Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate during period					1.75%
Term Loan [Member]
Debt Instrument [Line Items]
Interest rate at period end														3.10%										3.10%	3.10%	3.10%
Periodic payment terms, balloon payment to be paid \| £								£ 7,000,000
Term Loan [Member] \| Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Face amount																												$ 30,000,000
Number of loans \| loan																												2
Term Loan [Member] \| Ames UK [Member]
Debt Instrument [Line Items]
Face amount \| £								14,000,000
Debt instrument, periodic payment, principal \| £								£ 350,000
Long-term Line of Credit, Noncurrent														$ 4,639,000											$ 6,087,000
Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate								2.25%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable rate								1.50%
Interest rate at period end														2.25%										2.25%	2.25%	2.25%
Revolving Credit Facility [Member] \| Ames UK [Member]
Debt Instrument [Line Items]
Face amount \| £								£ 5,000,000
Term And Mortgage Loan July 2018 [Member] \| Ames UK [Member]
Debt Instrument [Line Items]
Long-term debt														$ 16,698,000											$ 21,910,000
Senior Notes 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			5.25%																										5.25%			5.25%
Face amount																																$ 600,000,000
Long-term debt																$ 988,252,000						$ 988,252,000			989,977,000
Capitalized Fees & Expenses																$ 12,968,000						$ 12,968,000			$ 11,066,000
Debt instrument, interest rate, effective percentage														5.25%		5.25%						5.25%		5.25%	5.25%	5.25%
Senior Notes 2022 [Member] \| Fair Value, Inputs, Level 1 [Member]
Debt Instrument [Line Items]
Convertible debt, fair value disclosures																									$ 985,770,000
Senior Notes 2022 [Member]
Debt Instrument [Line Items]
Capitalized Fees & Expenses			$ 8,472,000
Revolver due 2019 [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity																																	$ 250,000,000
Revolver Due 2020 [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity					$ 350,000,000
Real estate mortgages [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis																				The loans had an interest rate of LIBOR plus 1.50%
Term Loan August 2016 [Member]
Debt Instrument [Line Items]
Face amount											$ 35,092,000
Amount of line note available to purchase common stock in open market											$ 10,908,000
Internal Loan March 2019 [Member]
Debt Instrument [Line Items]
Long-term debt																									33,556,000
Debt instrument, periodic payment, principal																				$ 569,000
Internal Loan March 2019 [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate																				2.91%
ESOP Loans [Member]
Debt Instrument [Line Items]
Long-term debt																$ 34,508,000						$ 34,508,000			0
Capitalized Fees & Expenses																186,000						186,000			0
Debt instrument, periodic payment, principal				$ 569,000
Capital lease - real estate [Member]
Debt Instrument [Line Items]
Long-term debt																7,423,000						7,423,000			5,903,000
Capitalized Fees & Expenses																$ 80,000						$ 80,000			$ 68,000
Debt instrument, interest rate, effective percentage														5.00%		5.00%						5.00%		5.00%	5.00%	5.00%
Non U.S. lines of credit [Member]
Debt Instrument [Line Items]
Long-term debt																$ 7,935,000						$ 7,935,000			$ 17,415,000
Capitalized Fees & Expenses																$ 16,000						$ 16,000			8,000
Long-term line of credit																									0
Remaining borrowing capacity																									$ 11,174,000	$ 15,000
Proceeds from long-term lines of credit													$ 15,000							$ 11,174,000
Non U.S. lines of credit [Member] \| Libor Rate [Member]
Debt Instrument [Line Items]
Interest rate at period end														3.79%										3.79%	3.79%	3.79%
Non U.S. lines of credit [Member] \| Bankers Acceptance Rate [Member]
Debt Instrument [Line Items]
Interest rate at period end														3.14%										3.14%	3.14%	3.14%
Term Loan May 2014 [Member] \| Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Face amount																												$ 10,000,000
Debt instrument, periodic payment, principal												$ 1,250,000
Maximum borrowing capacity increase (decrease)						$ (10,000,000)			$ 15,000,000	$ 5,000,000
Term Loan December 2013 and May 2014 [Member] \| Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Long-term line of credit																								$ 28,375,000	$ 20,104,000
Basis spread on variable rate												1.90%
Debt instrument, interest rate, effective percentage														3.62%										3.62%	3.62%	3.62%
Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate														1.50%
Mortgages [Member] \| Ames UK [Member]
Debt Instrument [Line Items]
Face amount \| £								4,000,000
Debt instrument, periodic payment, principal \| £								83,000
Interest rate at period end														2.65%										2.65%	2.65%	2.65%
Periodic payment terms, balloon payment to be paid \| £								£ 2,333,000
Senior Notes 2022 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Proceeds from issuance of debt			$ 275,000,000
Long-term debt																									$ 1,000,000,000
Unamortized Debt Issuance Expense																									11,066,000
Senior Notes due 2022, May 2016 Add-On Issuance [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Issuance price, percentage			101.00%																										98.76%
Face amount																													$ 125,000,000
Debt issuance costs, net																									13,329,000
Term Loan 1 [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 5,705,000
Term Loan Due 2019 [Member] \| Medium-term Notes [Member]
Debt Instrument [Line Items]
Number of loans refinanced with new debt instrument \| loan																												2
Periodic payment terms, balloon payment to be paid																												$ 13,375,000
Revolving Facility, June 2017 [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity																											$ 20,000	$ 10,000,000
Receivables Purchase Facility [Member]
Debt Instrument [Line Items]
Long-term debt																								$ 10,000,000	$ 7,085,000
Basis spread on variable rate												1.00%
Proceeds from long-term lines of credit							$ 10,000,000
Debt instrument, interest rate, effective percentage														2.75%										2.75%	2.75%	2.75%
Line of Credit One [Member] \| Non U.S. lines of credit [Member] \| Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Long-term debt																								$ 6,000,000	$ 4,251,000
Basis spread on variable rate												1.80%
Debt instrument, interest rate, effective percentage														3.55%										3.55%	3.55%	3.55%