Other Long-Term Obligations Narrative (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2014
Other Liabilities Disclosure [Abstract]
Payments for deferred compensation arrangement	$ 2,545
Expected payment to retired executives	8,280
Expected payment within next 12 months	847
Current liabilities reclassified from Other long-term obligations	$ 9,127

Deferred Compensation, Cash Based Arrangement, Expected Payment within Next Twelve Months

No definition available.

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