Business and Intangible Asset Acquisitions and Joint Ventures (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	May 31, 2014	Mar. 04, 2014 PayPros [Member]	Mar. 04, 2014 PayPros [Member] Customer-Related Intangible Assets [Member]	Mar. 04, 2014 PayPros [Member] Contract-Based Intangible Assets [Member]	Mar. 04, 2014 PayPros [Member] Technology-Based Intangible Assets [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Goodwill	$ 1,324,374	$ 1,337,285	$ 270,991
Acquired intangible assets				147,500	30,200	10,800
Fixed assets			1,680
Other assets			4,229
Total assets acquired			465,400
Deferred income taxes			(38,948)
Net assets acquired			$ 426,452