Business Combinations (Intangible Assets Acquired) (Details) (RelateIQ, Inc. [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Aug. 14, 2014
Business Acquisition [Line Items]
Fair Value	$ 16,200
Developed Technology [Member]
Business Acquisition [Line Items]
Fair Value	14,470
Useful Life	7 years
Customer Relationship and Other [Member]
Business Acquisition [Line Items]
Fair Value	$ 1,730
Customer Relationship and Other [Member] | Minimum
Business Acquisition [Line Items]
Useful Life	1 year
Customer Relationship and Other [Member] | Maximum
Business Acquisition [Line Items]
Useful Life	3 years