Concentration Of Credit Risk (Details)	Mar. 31, 2017 USD ($)
Risks and Uncertainties [Abstract]
Retained Recourse Obligation For Events Of Default Under Contracts	$ 4,208,000
Events of Default Under Contract by Third Party	$ 26,783,000

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