RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES: (Details 2) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Gains, Losses and Other Items
Restructuring plan charges and adjustments		$ 17,810,000	$ 2,894,000	$ 12,778,000
Earnout liability adjustment (see note 3)				(2,598,000)
Gains, losses and other items		22,096,000	2,010,000	12,638,000
Gains, losses and other items
Gains, Losses and Other Items
Restructuring plan charges and adjustments	11,100,000	17,810,000	2,894,000	12,778,000
Legal contingencies (see Note 11)		4,202,000
Earnout liability adjustment (see note 3)				(2,598,000)
Other		84,000	(884,000)	2,458,000
Gains, losses and other items		$ 22,096,000	$ 2,010,000	$ 12,638,000