GOODWILL: (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2016 USD ($)
Goodwill
Goodwill at the beginning of year	$ 492,745
Allant Adjustment	19
Change in foreign currency translation adjustment	(166)
Goodwill at the end of year	492,598
U.S. reporting unit
Goodwill
Goodwill at the end of year	481,207
APAC reporting unit
Goodwill
Goodwill at the end of year	11,391
Marketing Services
Goodwill
Goodwill at the beginning of year	124,586
Change in foreign currency translation adjustment	(115)
Goodwill at the end of year	124,471
Marketing Services | U.S. reporting unit
Goodwill
Goodwill at the end of year	116,594
Marketing Services | APAC reporting unit
Goodwill
Goodwill at the end of year	7,877
Audience Solutions
Goodwill
Goodwill at the beginning of year	273,430
Allant Adjustment	19
Goodwill at the end of year	273,449
Audience Solutions | U.S. reporting unit
Goodwill
Goodwill at the end of year	273,449
Connectivity
Goodwill
Goodwill at the beginning of year	94,729
Change in foreign currency translation adjustment	(51)
Goodwill at the end of year	94,678
Connectivity | U.S. reporting unit
Goodwill
Goodwill at the end of year	91,164
Connectivity | APAC reporting unit
Goodwill
Goodwill at the end of year	$ 3,514