RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES: (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Restructuring activity
Balance at the beginning of the period				$ 16,759		$ 16,759	$ 12,710	$ 20,646
Restructuring charges and adjustments						21,818	17,712	2,635
Payments						(17,716)	(13,663)	(10,571)
Balance at the end of the period	20,861				16,759	20,861	16,759	12,710
Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments	12,100	4,200	900	6,700	10,700	23,794	17,712	2,635
Fiscal 2015 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments						23,800
Fiscal 2014 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments							17,700
Fiscal 2013 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments								2,600
Associate-related reserves
Restructuring activity
Balance at the beginning of the period				6,542		6,542	3,689	9,597
Restructuring charges and adjustments						13,757	13,916	2,577
Payments						(13,088)	(11,063)	(8,485)
Balance at the end of the period	7,211				6,542	7,211	6,542	3,689
Associate-related reserves | Fiscal 2015 | United States, Australia, China and Europe
Restructuring activity
Restructuring charges and adjustments						13,800
Balance at the end of the period	7,200					7,200
Associate-related reserves | Fiscal 2015 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments						13,800
Associate-related reserves | Fiscal 2014 | United States, Australia, China and Europe
Restructuring activity
Restructuring charges and adjustments						700	13,900
Associate-related reserves | Fiscal 2014 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments							13,900
Associate-related reserves | Fiscal 2013 | United States, Australia, and Europe
Restructuring activity
Restructuring charges and adjustments								2,600
Associate-related reserves | Fiscal 2013 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments								2,600
Lease accruals
Restructuring activity
Balance at the beginning of the period				10,217		10,217	9,021	11,049
Restructuring charges and adjustments						8,061	3,796	58
Payments						(4,628)	(2,600)	(2,086)
Balance at the end of the period	13,650				10,217	13,650	10,217	9,021
Lease accruals | Fiscal 2015
Restructuring activity
Balance at the end of the period	4,900					4,900
Lease accruals | Fiscal 2015 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments						8,100
Lease accruals | Fiscal 2014
Restructuring activity
Balance at the beginning of the period				3,400		3,400
Restructuring charges and adjustments						600
Lease accruals | Fiscal 2014 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments							3,800
Lease accruals | Fiscal 2013 | Gains, losses and other items, net
Restructuring activity
Restructuring charges and adjustments								100
Lease accruals | Fiscal years prior to fiscal 2013
Restructuring activity
Balance at the end of the period	5,400					5,400
Lease accruals | Fiscal 2008
Restructuring activity
Restructuring charges and adjustments						$ 700