LONG-TERM DEBT (Details) - Narrative $ / shares in Units, $ in Thousands						1 Months Ended								3 Months Ended		9 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 ($)	Nov. 30, 2012 CAD ($)	Jun. 30, 2019 GBP (£) $ / shares	Jun. 30, 2018 $ / shares	Jun. 30, 2019 USD ($) option $ / shares	Jun. 30, 2018 $ / shares	Sep. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2019 AUD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2019 CAD ($)	Sep. 30, 2018 USD ($)	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																				$ 1,170,505,000		$ 1,121,082,000
Capitalized Fees & Expenses																				11,876,000		$ 14,830,000
Maximum percentage of equity interest of subsidiaries borrowings guaranteed																65.00%
Long-term line of credit																				$ 20,628,000
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														$ 0.0725	$ 1.0700	$ 0.2175	$ 1.2100
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 Dividend [Member]
Debt Instrument [Line Items]
Dividends paid per common share (in dollars per share) | $ / shares	$ 1.00	$ 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																				$ 122,806,000
Remaining borrowing capacity																				$ 206,566,000
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														2.97%					2.97%	2.97%	2.97%
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														$ 1,140,000						$ 1,446,000
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														$ 16,266,000						$ 20,635,000
Senior Notes 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			5.25%											5.25%					5.25%	5.25%	5.25%	5.25%			5.25%			5.25%
Face amount																												$ 600,000,000
Long-term debt																				$ 990,839,000		$ 988,252,000
Capitalized Fees & Expenses																				10,116,000		12,968,000
Senior Notes 2022 [Member] | Fair Value, Inputs, Level 1 [Member]
Debt Instrument [Line Items]
Convertible debt, fair value disclosures																				998,800,000
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																				32,987,000
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																				0		34,508,000
Capitalized Fees & Expenses																				$ 0		$ 186,000
Debt instrument, periodic payment, principal				$ 569,000
Capital lease - real estate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage														5.00%					5.00%	5.00%	5.00%	5.00%
Long-term debt																				$ 5,124,000		$ 7,423,000
Capitalized Fees & Expenses																				61,000		80,000
Non U.S. lines of credit [Member]
Debt Instrument [Line Items]
Long-term debt																				8,438,000		7,935,000
Capitalized Fees & Expenses																				5,000		$ 16,000
Long-term line of credit																				0
Remaining borrowing capacity																				$ 11,435,000	$ 15,000
Proceeds from long-term lines of credit													$ 15,000			$ 11,435,000
Non U.S. lines of credit [Member] | Libor Rate [Member]
Debt Instrument [Line Items]
Interest rate at period end														3.70%					3.70%	3.70%	3.70%
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																			$ 27,125,000	$ 18,982,000
Basis spread on variable rate												1.90%
Debt instrument, interest rate, effective percentage														3.15%					3.15%	3.15%	3.15%
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														2.52%					2.52%	2.52%	2.52%
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
Face amount																				$ 725,000,000
Long-term debt																				1,000,000,000
Unamortized Debt Issuance Expense																				10,116,000
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	$ 6,997,000
Basis spread on variable rate												1.00%
Proceeds from long-term lines of credit							$ 10,000,000
Debt instrument, interest rate, effective percentage														2.27%					2.27%	2.27%	2.27%
Line of Credit One [Member] | Non U.S. lines of credit [Member] | Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Long-term debt																				$ 0
Basis spread on variable rate												1.80%
Debt instrument, interest rate, effective percentage														3.07%					3.07%	3.07%	3.07%