GOODWILL: (Details 2) (USD $) In Thousands, unless otherwise specified	0 Months Ended
	Apr. 01, 2014 component	Dec. 31, 2014	Apr. 01, 2014	Mar. 31, 2014
Goodwill information
Number of components tested for impairment	5
Goodwill		$ 572,589		$ 358,384
Fair values in excess of the carrying value (as a percent)	35.00%		35.00%
U.S. Marketing and Data Services
Goodwill information
Goodwill	266,700		266,700
Australia Marketing and Data Services
Goodwill information
Goodwill	13,300		13,300
China Marketing and Data Services
Goodwill information
Goodwill	6,000		6,000
Brazil Marketing and Data Services
Goodwill information
Goodwill	900		900
U.S. Infrastructure Management
Goodwill information
Goodwill	$ 71,500		71,500