Acquisitions (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 Metrum Technologies LLC [Member]	Dec. 21, 2012 Felix Tool & Engineering, Inc. [Member]	Dec. 10, 2012 Finepoint Marketing, Inc. [Member]
Business Acquisition [Line Items]
Purchase price	$ 25.0	$ 1.2	$ 2.5
Period which future revenues for contingent consideration are based	4 years
Goodwill as a result of the transaction	25.0		1.3
Amortizable identifiable intangible assets	11.2	0	1.2
Contingent consideration	$ 13.7