BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Prior Period Adjustments Restatement [Line Items]
Cost of revenue	$ 125,735	$ 125,807	$ 364,756	$ 366,329
Research and development	18,400	18,973	57,489	55,121
Sales and marketing	36,581	30,554	100,334	85,410
General and administrative	36,793	31,821	100,055	102,794
As previously reported
Prior Period Adjustments Restatement [Line Items]
Cost of revenue		162,521		474,294
Selling, general and administrative		44,634		135,360
Adjustment for pronouncements not yet adopted | Accounting Standard Update 2015-03
New Accounting Pronouncements Not Yet Adopted
Unamortized debt issuance costs	3,000		3,000
Long-term Debt	$ (3,000)		$ (3,000)
Category expansion
Prior Period Adjustments Restatement [Line Items]
Cost of revenue		(18,973)		(55,121)
Research and development		18,973		55,121
Selling, general and administrative		(44,634)		(135,360)
Sales and marketing		15,342		40,216
General and administrative		29,292		95,144
Account management reclass
Prior Period Adjustments Restatement [Line Items]
Cost of revenue		(15,454)		(45,436)
Sales and marketing		15,454		45,436
IT reclass and other
Prior Period Adjustments Restatement [Line Items]
Cost of revenue		(2,287)		(7,408)
Sales and marketing		(242)		(242)
General and administrative		$ 2,529		$ 7,650