Basis of Presentation (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	1 Months Ended
May 31, 2013 Segments	Feb. 28, 2013 product_lines	Jun. 30, 2013 Divestiture of Apama [Member] Apama [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of product lines divested		10
Number of reportable segments	2
Sale of Apama product line, sales price			$ 44.3

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration