Segment Information (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Operating Segments [Member] | Property Intelligence [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	$ 1.0	$ 1.2
Segment reporting intercompany expense	0.7	1.7
Operating Segments [Member] | Risk Management and Work Flow [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	0.7	1.7
Segment reporting intercompany expense	$ 1.0	$ 1.2