LONG-TERM DEBT (Details) $ / shares in Units, CAD in Thousands, BRL in Thousands					1 Months Ended		3 Months Ended			6 Months Ended					12 Months Ended
	Jan. 17, 2017 USD ($) shares	Oct. 01, 2016 USD ($)	Jul. 14, 2016 USD ($)	Mar. 13, 2015 USD ($)	May 31, 2014 USD ($)	Nov. 30, 2010 EUR (€)	Mar. 31, 2017 EUR (€) installment	Mar. 31, 2017 USD ($) installment	Mar. 31, 2016 USD ($)	Mar. 31, 2017 EUR (€) shares	Mar. 31, 2017 CAD shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2011 EUR (€)	Sep. 30, 2007 USD ($)	Mar. 31, 2017 AUD	Mar. 31, 2017 USD ($)	Mar. 31, 2017 BRL	Feb. 28, 2017 AUD	Jul. 31, 2016 AUD loan	May 18, 2016 USD ($)	Mar. 31, 2016 AUD	Mar. 31, 2016 USD ($)	May 31, 2014 AUD	Feb. 27, 2014 USD ($)	Feb. 14, 2014 USD ($)	Oct. 21, 2013 USD ($) property	Dec. 21, 2009 USD ($)
Debt Instrument [Line Items]
Face amount															$ 32,280,000				$ 8,000,000						$ 35,092,000				$ 36,012,000
Long-term debt outstanding															936,558,000				1,010,333,000
Interest paid								$ 11,641,000	$ 10,678,000			$ 23,099,000	$ 21,030,000
Underwriting fees and other expense capitalized															10,313,000
Maximum percentage of equity interest of subsidiaries borrowings guaranteed										65.00%	65.00%	65.00%
Line of credit facility, amount outstanding																			16,440,000
Number of properties refinanced | property																													4
Debt instrument, description of variable rate basis																The revolving credit facility accrues interest at EURIBOR plus 1.75% per annum (1.75% at March 31, 2017).
Debt instrument, basis spread on variable rate									1.30%	1.30%	1.30%	1.30%
Long-term debt, gross															952,856,000				1,024,178,000
Amount of line note available to purchase common stock in open market														$ 10,908,000
Shares purchased for award value												$ 9,213,000
Shares purchased for award value (usd per share) | $ / shares												$ 16.78
Employee stock ownership plan (ESOP), repurchase obligation amount																			1,695,000
Stock issued during period, shares, employee stock ownership plan | shares										548,912	548,912	548,912
Proceeds from issuance of long-term debt												$ 195,655,000	139,604,000
Capital lease maturity year																	2022
Long-term debt, percentage bearing fixed interest, percentage rate																	5.00%
Issuance of treasury stock in settlement of convertible debt												48,858,000
Convert. debt due 2017 [Member]
Debt Instrument [Line Items]
Face amount																														$ 100,000,000
Debt instrument, interest rate, stated percentage																														4.00%
Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, frequency of periodic payment | installment							12	12
LIBOR Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate during period				2.25%
Revolving Credit Facility [Member] | Revolving Facility, June 2017 [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity | AUD																		AUD 20,000				AUD 10,000,000
Revolver due 2019 [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding																			176,000,000
Line of credit facility, remaining borrowing capacity																			$ 157,560,000
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																												$ 50,000,000
Revolver due 2019 [Member] | Margin Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate during period				1.25%
Senior Notes [Member] | Senior Notes 2022 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding																							$ 725,000,000
Senior Notes [Member] | Senior Notes due 2022, May 2016 Add-On Issuance [Member]
Debt Instrument [Line Items]
Face amount																							$ 125,000,000
Issuance price, percentage																							98.76%
Debt issuance cost								$ 3,016,000
Mortgages [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							1.50%	1.50%
Revolver Due 2020 [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity				$ 350,000,000
Convertible Notes 2017 [Member]
Debt Instrument [Line Items]
Debt conversion, converted instrument, amount	$ 173,855,000
Debt instrument, interest rate, effective percentage							4.00%			4.00%								4.00%	4.00%	4.00%
Debt conversion, converted instrument, cash received	125,000,000
Issuance of treasury stock in settlement of convertible debt	$ 48,858,000
Debt conversion, converted instrument, shares issued | shares	1,954,993
Senior notes due 2022 [Member]
Debt Instrument [Line Items]
Face amount																											$ 600,000,000
Debt instrument, interest rate, stated percentage																											5.25%
Long-term debt outstanding															713,754,000				$ 714,641,000
Interest paid								$ 9,515,000	$ 7,875,000			$ 19,031,000	$ 15,750,000
Debt conversion, original debt, amount			$ 125,000,000
Long-term debt, gross															$ 725,000,000				$ 725,000,000
Debt instrument, interest rate during period							5.60%	5.60%	5.50%	5.60%	5.60%	5.60%	5.50%
Debt instrument, interest rate, effective percentage							5.25%			5.25%					5.25%			5.25%	5.25%	5.25%
Real estate mortgages [Member]
Debt Instrument [Line Items]
Long-term debt outstanding															$ 37,266,000				$ 36,012,000
Interest paid								$ 229,000	$ 154,000			$ 416,000	$ 305,000
Debt instrument, description of variable rate basis										The loans bear interest at a rate of LIBOR plus 1.50%	The loans bear interest at a rate of LIBOR plus 1.50%	The loans bear interest at a rate of LIBOR plus 1.50%
Debt instrument, basis spread on variable rate										2.25%	2.25%	2.25%
Long-term debt, gross															37,861,000				36,519,000
Debt instrument, interest rate during period							2.60%	2.60%	2.20%	2.40%	2.40%	2.40%	2.10%
ESOP Loans [Member]
Debt Instrument [Line Items]
Long-term debt outstanding															34,150,000				41,945,000
Interest paid								$ 369,000	$ 275,000			$ 733,000	$ 531,000
Debt instrument, basis spread on variable rate										2.50%	2.50%	2.50%
Long-term debt, gross															$ 34,387,000				42,290,000
Debt instrument, periodic payment, principal		$ 569,000										$ 655,000
Debt instrument, interest rate during period							4.00%	4.00%	3.30%	4.10%	4.10%	4.10%	3.10%
ESOP Loan July 2014 [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate										2.50%	2.50%	2.50%
Term Loan December 2013 and May 2014 [Member] | Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding																		AUD 32,625,000	$ 25,004,000
Debt instrument, basis spread on variable rate									2.00%
Debt instrument, interest rate, effective percentage							3.85%			3.85%								3.85%	3.85%	3.85%
Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt outstanding							€ 7,500,000			€ 7,500,000									$ 8,052,000
Long-term debt, percentage bearing fixed interest, percentage rate															2.50%
Proceeds from long-term lines of credit | €						€ 15,000,000
Debt instrument, interest rate, effective percentage							3.85%			3.85%								3.85%	3.85%	3.85%
Debt instrument, periodic payment | €							€ 1,250,000
Term Loan [Member] | Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Face amount | AUD																								AUD 30,000,000
Number of lines | loan																						2
Term Loan May 2014 [Member] | Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Face amount | AUD																										AUD 10,000,000
Debt instrument, periodic payment, principal					$ 875,000
Line of credit facility, maximum borrowing capacity																			$ 33,500,000		AUD 5,000,000
Medium-term Notes [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Number of loans refinanced with new debt instrument | loan																						2
Debt instrument, periodic payment terms, balloon payment to be paid | AUD																						AUD 24,750,000
Capital lease - real estate [Member]
Debt Instrument [Line Items]
Long-term debt outstanding															$ 6,316,000				5,767,000
Interest paid								$ 75,000	$ 90,000			$ 155,000	$ 183,000
Long-term debt, gross															$ 6,447,000				$ 5,885,000
Proceeds from issuance of long-term debt																	$ 14,290,000
Debt instrument, interest rate during period							5.40%	5.40%	5.40%	5.40%	5.40%	5.40%	5.40%
Debt instrument, interest rate, effective percentage							5.00%			5.00%					5.00%			5.00%	5.00%	5.00%
Revolver Due 2013 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding																			$ 0
Debt instrument, basis spread on variable rate							1.75%	1.75%		1.75%	1.75%	1.75%
Proceeds from long-term lines of credit | €										€ 5,368,000						€ 5,000,000
Non U.S. term loans [Member]
Debt Instrument [Line Items]
Long-term debt outstanding															$ 33,422,000				32,813,000
Interest paid								$ 308,000	$ 272,000			$ 612,000	$ 556,000
Line of credit facility, amount outstanding																			1,731,000	BRL 5,485
Long-term debt, gross															33,669,000				33,056,000
Maintains maximum amount of line of credit																			$ 2,209,000	BRL 7,000
Non U.S. term loans [Member] | Brazilian CDI [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end							15.20%			15.20%								15.20%	15.20%	15.20%
Non U.S. lines of credit [Member]
Debt Instrument [Line Items]
Long-term debt outstanding															11,461,000				$ 1,659,000
Interest paid								61,000	97,000			196,000	356,000
Line of credit facility, amount outstanding																			0
Long-term debt, gross															11,462,000				$ 1,731,000
Proceeds from long-term lines of credit											CAD 15,000	11,258,000
Non U.S. lines of credit [Member] | Line of Credit One [Member] | Northcote Holdings Pty. Ltd [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate														2.00%
Debt instrument, interest rate, effective percentage							3.67%			3.67%								3.67%	3.67%	3.67%
Non U.S. lines of credit [Member] | LIBOR Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end							2.45%			2.45%								2.45%	2.45%	2.45%
Non U.S. lines of credit [Member] | Bankers Acceptance Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end							2.18%			2.18%								2.18%	2.18%	2.18%
Revolver due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding															(2,425,000)				$ 173,821,000
Interest paid								$ 1,326,000	$ 954,000			$ 1,651,000	$ 1,525,000
Line of credit facility, current borrowing capacity																												$ 250,000,000
Long-term debt, gross															$ 0				176,000,000
Fair Value, Inputs, Level 1 [Member] | Senior notes due 2022 [Member]
Debt Instrument [Line Items]
Convertible debt, fair value disclosures																			$ 725,000,000