Business and Basis of Presentation (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)
Business Acquisition [Line Items]
Number of reportable segments | segment		3
Restricted cash for indemnification claims		$ 25,625,000	$ 14,363,000
Acquisition related costs	$ 6,500,000	15,300,000
Increase (decrease) in contingent consideration		$ (9,200,000)
Nubera and Capterra
Business Acquisition [Line Items]
Percentage of capital stock acquired	100.00%	100.00%
Aggregate purchase price	$ 206,200,000
Cash payment placed in escrow for potential indemnification claims	30,000,000
Contingent consideration arrangement range of outcome (up to)	32,000,000	$ 32,000,000
Recognized identifiable assets acquired and liabilities assumed, finite-lived intangible assets and goodwill	216,700,000	216,700,000
Recognized identifiable assets acquired and liabilities assumed, other assets	23,100,000	23,100,000
Recognized identifiable assets acquired and liabilities assumed, other liabilities	$ 33,600,000	33,600,000
Nubera and Capterra | Other Noncurrent Assets
Business Acquisition [Line Items]
Restricted cash for indemnification claims		$ 25,600,000