LONG-TERM DEBT (Details)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended						0 Months Ended	6 Months Ended	12 Months Ended		0 Months Ended						0 Months Ended				3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			1 Months Ended	6 Months Ended	3 Months Ended		1 Months Ended			6 Months Ended	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended		12 Months Ended	3 Months Ended		6 Months Ended			3 Months Ended			6 Months Ended				1 Months Ended		1 Months Ended					3 Months Ended		6 Months Ended				0 Months Ended
	Dec. 31, 2013 USD ($) loan	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2011	Sep. 30, 2007	Oct. 21, 2013 USD ($) property	Mar. 31, 2015 Northcote Holdings Pty. Ltd [Member] USD ($) line_of_credit	May 31, 2014 Northcote Holdings Pty. Ltd [Member] loan	Dec. 21, 2009 Convert. debt due 2017 [Member]	Mar. 31, 2015 Convert. debt due 2017 [Member] USD ($)	Sep. 30, 2014 Convert. debt due 2017 [Member] USD ($)	Dec. 21, 2009 Convert. debt due 2017 [Member] USD ($)	Mar. 13, 2015 LIBOR Rate [Member]	Feb. 14, 2014 LIBOR Rate [Member]	Mar. 31, 2015 Revolver due 2019 [Member] USD ($)	Mar. 13, 2015 Revolver due 2019 [Member] Letter Of Credit Subfacility [Member] USD ($)	Feb. 14, 2014 Revolver due 2019 [Member] Letter Of Credit Subfacility [Member] USD ($)	Feb. 14, 2014 Revolver due 2019 [Member] Multicurrency Subfacility [Member] USD ($)	Mar. 13, 2015 Revolver due 2019 [Member] Margin Rate [Member]	Feb. 14, 2014 Revolver due 2019 [Member] Margin Rate [Member]	Mar. 13, 2015 Revolver Due 2020 [Member] USD ($)	Mar. 31, 2015 Convertible Notes 2017 [Member]	Mar. 31, 2015 Senior notes due 2022 [Member] USD ($)	Mar. 31, 2014 Senior notes due 2022 [Member] USD ($)	Mar. 31, 2015 Senior notes due 2022 [Member] USD ($)	Mar. 31, 2014 Senior notes due 2022 [Member] USD ($)	Sep. 30, 2014 Senior notes due 2022 [Member] USD ($)	Feb. 27, 2014 Senior notes due 2022 [Member] USD ($)	Mar. 31, 2015 Senior notes due 2018 [Member] USD ($)	Mar. 31, 2014 Senior notes due 2018 [Member] USD ($)	Mar. 31, 2015 Senior notes due 2018 [Member] USD ($)	Mar. 31, 2014 Senior notes due 2018 [Member] USD ($)	Mar. 31, 2015 Senior Notes [Member] USD ($)	Mar. 31, 2015 Real estate mortgages [Member] USD ($)	Mar. 31, 2014 Real estate mortgages [Member] USD ($)	Mar. 31, 2015 Real estate mortgages [Member] USD ($)	Mar. 31, 2014 Real estate mortgages [Member] USD ($)	Sep. 30, 2014 Real estate mortgages [Member] USD ($)	Mar. 31, 2015 ESOP Loans [Member] USD ($)	Mar. 31, 2014 ESOP Loans [Member] USD ($)	Mar. 31, 2015 ESOP Loans [Member] USD ($)	Mar. 31, 2014 ESOP Loans [Member] USD ($)	Sep. 30, 2014 ESOP Loans [Member] USD ($)	Jul. 31, 2014 ESOP Loan July 2014 [Member] USD ($)	Mar. 31, 2015 ESOP Loan July 2014 [Member] London Interbank Offered Rate (LIBOR) [Member]	Mar. 31, 2014 Term Loan December 2013 and May 2014 [Member] Northcote Holdings Pty. Ltd [Member]	Mar. 31, 2015 Term Loan December 2013 and May 2014 [Member] Northcote Holdings Pty. Ltd [Member] USD ($)	Nov. 30, 2010 Term Loan [Member] EUR (€)	Mar. 31, 2015 Term Loan [Member]	Mar. 31, 2014 Term Loan [Member] Northcote Holdings Pty. Ltd [Member] AUD	Mar. 31, 2015 Term Loan [Member] Brazilian CDI [Member]	May 31, 2014 Term Loan May 2014 [Member] Northcote Holdings Pty. Ltd [Member] USD ($)	May 31, 2014 Term Loan May 2014 [Member] Northcote Holdings Pty. Ltd [Member] AUD	Mar. 31, 2015 Capital lease - real estate [Member] USD ($)	Mar. 31, 2014 Capital lease - real estate [Member] USD ($)	Mar. 31, 2015 Capital lease - real estate [Member] USD ($)	Mar. 31, 2014 Capital lease - real estate [Member] USD ($)	Sep. 30, 2007 Capital lease - real estate [Member] USD ($)	Sep. 30, 2014 Capital lease - real estate [Member] USD ($)	Sep. 30, 2011 Revolver Due 2013 [Member] EUR (€)	Mar. 31, 2015 Non U.S. term loans [Member] USD ($)	Mar. 31, 2014 Non U.S. term loans [Member] USD ($)	Mar. 31, 2015 Non U.S. term loans [Member] USD ($)	Mar. 31, 2014 Non U.S. term loans [Member] USD ($)	Sep. 30, 2014 Non U.S. term loans [Member] USD ($)	Mar. 31, 2015 Non U.S. lines of credit [Member] USD ($)	Mar. 31, 2015 Non U.S. lines of credit [Member] CAD	Mar. 31, 2014 Non U.S. lines of credit [Member] USD ($)	Mar. 31, 2015 Non U.S. lines of credit [Member] USD ($)	Mar. 31, 2014 Non U.S. lines of credit [Member] USD ($)	Mar. 31, 2014 Non U.S. lines of credit [Member] CAD	Sep. 30, 2014 Non U.S. lines of credit [Member] USD ($)	Dec. 31, 2013 Non U.S. lines of credit [Member] Line of Credit One [Member] Northcote Holdings Pty. Ltd [Member]	Mar. 31, 2015 Non U.S. lines of credit [Member] Line of Credit One [Member] Northcote Holdings Pty. Ltd [Member] USD ($)	May 31, 2014 Non U.S. lines of credit [Member] Line of Credit Two [Member] Northcote Holdings Pty. Ltd [Member]	Mar. 31, 2015 Non U.S. lines of credit [Member] Line of Credit Two [Member] Northcote Holdings Pty. Ltd [Member] USD ($)	Mar. 31, 2015 Non U.S. lines of credit [Member] Line of Credit Two [Member] Northcote Holdings Pty. Ltd [Member] AUD	Mar. 31, 2015 Non U.S. lines of credit [Member] LIBOR Rate [Member]	Mar. 31, 2015 Non U.S. lines of credit [Member] Bankers Acceptance Rate [Member]	Mar. 31, 2015 Revolver due 2019 [Member] USD ($)	Mar. 31, 2014 Revolver due 2019 [Member] USD ($)	Mar. 31, 2015 Revolver due 2019 [Member] USD ($)	Mar. 31, 2014 Revolver due 2019 [Member] USD ($)	Sep. 30, 2014 Revolver due 2019 [Member] USD ($)	Feb. 14, 2014 Revolver due 2019 [Member] USD ($)	Feb. 27, 2014 Senior notes due 2018 [Member] Senior Notes [Member] Senior Notes 2022 [Member] USD ($)	Feb. 27, 2014 Senior notes due 2018 [Member] Senior Notes [Member] Senior Notes 2022 [Member] USD ($)	Mar. 31, 2015 Fair Value, Inputs, Level 1 [Member] Convertible Notes 2017 [Member] USD ($)	Mar. 31, 2015 Fair Value, Inputs, Level 1 [Member] Senior notes due 2022 [Member] USD ($)
Debt Instrument [Line Items]
Face amount			$ 21,098,000		$ 21,098,000				$ 17,175,000						$ 100,000,000																$ 600,000,000																						12,500,000			20,000,000																																		$ 550,000,000
Debt instrument, interest rate, stated percentage															4.00%																5.25%	7.125%		7.125%																																																								7.125%
Payment of tender offer premium				31,530,000																																																																																					31,530,000
Interest paid		10,381,000	10,807,000	20,501,000	22,335,000																					7,875,000	2,800,000	15,750,000	2,800,000			0	6,133,000	0	15,930,000	16,716,000	116,000	122,000	240,000	252,000		254,000	180,000	514,000	332,000												102,000	114,000	208,000	233,000				337,000	101,000	725,000	153,000		109,000		224,000	250,000	417,000										659,000	306,000	997,000	473,000
Underwriting fees and other expense capitalized						10,313,000
Loss from debt extinguishment, net		0	(38,890,000)	0	(38,890,000)																											(38,890,000)
Write off of deferred debt issuance cost				6,574,000
Prepaid interest on defeased note on extinguishment of debt				786,000
Line of credit facility, current borrowing capacity																			50,000	60,000,000	50,000,000			250,000																																																					3,000,000		5,000,000	5,000,000								225,000,000
Line of credit facility, interest rate during period																2.00%	2.25%					1.00%	1.25%
Maximum percentage of equity interest of subsidiaries borrowings guaranteed				65.00%
Line of credit facility, amount outstanding		20,560,000		20,560,000						0								95,000,000																																25,079,000														2,200,000		2,200,000			2,291,000			2,291,000
Line of credit facility, remaining borrowing capacity																		134,440,000
Debt instrument, convertible, conversion ratio													69.3811
Debt conversion, converted instrument, amount														1,000
Debt instrument, convertible, conversion price (in Dollars per share)													$ 14.41
Debt instrument, convertible, terms of conversion feature												1.00%
Debt instrument, convertible, if-converted value in excess of principal													15,720,000
Convertible debt, fair value disclosures																																																																																											129,813,000	594,000,000
Number of properties refinanced									2
Debt instrument, description of variable rate basis							The revolving credit facility accrues interest at EURIBOR plus 2.20% per annum (2.28% at March 31, 2015).																																The loans bear interest at a rate of LIBOR plus 2.75%
Debt instrument, basis spread on variable rate			1.30%	2.20%																																			2.25%					2.38%				2.38%	2.80%																											2.25%		2.50%
Long-term debt, gross		888,164,000		888,164,000		822,571,000																				600,000,000		600,000,000		600,000,000							15,958,000		15,958,000		16,388,000	37,845,000		37,845,000		38,946,000											8,044,000		8,044,000			8,551,000		25,191,000		25,191,000		28,470,000	4,491,000			4,491,000			3,306,000								95,000,000		95,000,000		25,000,000
Number of refinanced ESOP loan	2
Number of new term loan refinance from esop loans	1
Amount of line note available to purchase common stock in open market	10,000,000																																														10,000,000
Shares purchased for award value				20,000,000
Shares purchased for award value (usd per share)				$ 12.57
Debt instrument, periodic payment, principal																																												551,000											625,000
Debt instrument balloon payment																																												30,137,000
Stock Issued During Period, Shares, Employee Stock Ownership Plan				1,591,117
Proceeds from issuance of long-term debt				99,556,000	644,514,000																																																								14,290,000
Capital lease maturity year								2022
Long-term debt, percentage bearing fixed interest, percentage rate								5.00%
Proceeds from long-term lines of credit																																																			20,000,000												10,000,000							12,110,000				15,000,000
Debt instrument, number of loans										2	2
Maintains maximum amount of line of credit																																																																$ 4,000,000		$ 4,000,000
Debt instrument, interest rate during period				6.00%																						5.50%		5.50%					7.10%		7.10%		3.80%	3.80%	3.90%	4.00%		2.90%	3.40%	2.90%	3.20%									18.60%			5.30%	5.30%	5.30%	5.30%
Line of credit facility, interest rate at period end																																																																																	1.54%	2.45%
Debt instrument, interest rate, effective percentage																									4.00%	5.25%		5.25%		5.25%																				5.20%		2.28%					5.00%		5.00%			5.00%															4.61%		4.86%	4.86%