STOCKHOLDERS' EQUITY: (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended			55 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2016	May. 19, 2015
Authorized shares and par value disclosure
Common stock, authorized shares	200,000,000	200,000,000		200,000,000
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10		$ 0.10
Preferred stock, authorized shares	1,000,000			1,000,000
Preferred stock, par value (in dollars per share)	$ 1.00			$ 1.00
Stockholders' Equity
Number of warrants outstanding (in shares)	4,942			4,942
Warrants exercise price (in dollars per share)	$ 13.24			$ 13.24
Maximum amount of common stock that may be repurchased					$ 300,000
Number of shares repurchased	2,600,000	500,000	2,000,000	15,500,000
Value of shares repurchased	$ 52,764	$ 9,868	$ 52,663	$ 255,200
Remaining capacity under the stock repurchase program	44,800			$ 44,800
Dividends paid on common stock	$ 0	$ 0	$ 0