EARNINGS (LOSS) PER SHARE AND STOCKHOLDERS' EQUITY: (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015
Basic earnings (loss) per share:
Net loss from continuing operations	$ (5,182)	$ (10,741)
Net earnings from discontinued operations	4,143	3,137
Net loss	$ (1,039)	$ (7,604)
Basic weighted-average shares outstanding	77,918	76,833
Continuing operations (in dollars per share)	$ (0.07)	$ (0.14)
Discontinued operations (in dollars per share)	0.05	0.04
Net loss (in dollars per share)	$ (0.01)	$ (0.10)
Diluted earnings (loss) per share:
Basic weighted-average shares outstanding	77,918	76,833
Diluted weighted-average shares outstanding	77,918	76,833
Continuing operations (in dollars per share)	$ (0.07)	$ (0.14)
Discontinued operations (in dollars per share)	0.05	0.04
Net loss (in dollars per share)	$ (0.01)	$ (0.10)
Stockholders' Equity
Number of shares outstanding under options, warrants and restricted stock units	2,029	1,872
Repurchase of treasury stock	$ 14,951
Cumulative amount paid for repurchase of treasury stock	$ 961,343		$ 945,274
Options, warrants and restricted stock units
Stockholders' Equity
Number of shares outstanding under options, warrants and restricted stock units	1,400	1,500
Minimum
Stockholders' Equity
Range of exercise prices for options and warrants (in dollars per share)	$ 2.58	$ 21.17
Maximum
Stockholders' Equity
Range of exercise prices for options and warrants (in dollars per share)	$ 62.06	$ 62.06
2011 Common stock repurchase program
Stockholders' Equity
Maximum amount of common stock that may be repurchased	$ 300,000
Shares repurchased	800
Repurchase of treasury stock	$ 15,000
Cumulative shares repurchased	13,700
Cumulative amount paid for repurchase of treasury stock	$ 217,400
Remaining capacity under the stock repurchase program	$ 82,600