Contingencies (Details) (Lawsuit Against Sonitrol Corporation [Member], USD $) In Millions, unless otherwise specified		0 Months Ended
Jul. 19, 2012 issue	Apr. 11, 2014 Subsequent Event [Member]
Gain Contingencies [Line Items]
Number of issues appealed and upheld by trial court's ruling	2
Number of issues being appealed	3
Amount of settlement awarded		$ 2.75

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