Business Combinations and Divestiture (Narrative) (Details) - USD ($) $ in Thousands				3 Months Ended		6 Months Ended
	Jun. 10, 2015	May. 29, 2015	May. 01, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Purchase price						$ 391,531	$ 0
Goodwill				$ 1,747,950		1,747,950		$ 1,672,721
Sale price of business						289,639	101,454
Gain on sale of business						107,548	26,152
Imagitas
Business Acquisition [Line Items]
Sale price of business		$ 291,000
Gain on sale of business		$ 109,000
Borderfree
Business Acquisition [Line Items]
Percentage of business acquired	100.00%
Purchase price	$ 386,000
Cash acquired	88,000
Revenues				7,000		7,000
Pro forma revenues				$ 22,000	$ 31,000	$ 47,000	$ 57,000
Goodwill	285,727
Intangible assets	156,800
Borderfree | Software & technology
Business Acquisition [Line Items]
Intangible assets	$ 12,600
Amortization period	5 years
Borderfree | Selling, general and administrative expense
Business Acquisition [Line Items]
Accelerated stock-based compensation expense	$ 10,000
Borderfree | Other (Income) Expense, Net
Business Acquisition [Line Items]
Acquisition-related costs	$ 8,000
Real Time Content
Business Acquisition [Line Items]
Payment to acquire business			$ 6,000