Contingencies (Details) (Patent Infringement [Member], USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
Apr. 22, 2013
Patent Infringement [Member]
Loss Contingencies [Line Items]
Litigation settlement amount	$ 1.5
Litigation settlement amount, net of taxes	$ 1.0
Litigation settlement amount, impact on diluted earnings per share	$ 0.04

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration