Concentration Of Credit Risk (Details)	Sep. 30, 2016 USD ($)
Risks and Uncertainties [Abstract]
Retained Recourse Obligation For Events Of Default Under Contracts	$ 6,221,000
Events of Default Under Contract by Third Party	$ 36,039,000

Concentration Risk, Retained Recourse Obligation For Default of Customer Lease Obligations Under Contract

No definition available.

Name:	ivc_ConcentrationRiskRetainedRecourseObligationForDefaultofCustomerLeaseObligationsUnderContract
Namespace Prefix:	ivc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant