Note 4 - Investments (Details) - Net Unrealized Gains for Investments Classified as Available-for-sale (USD $)	Jun. 30, 2013	Dec. 31, 2012
Net Unrealized Gains for Investments Classified as Available-for-sale [Abstract]
Net unrealized appreciation on available-for sale securities	$ 22,350,445	$ 44,222,622
Adjustment to deferred acquisition costs	(642,329)	(1,312,922)
Deferred income taxes	(7,602,595)	(14,821,597)
Net unrealized appreciation on available-for sale securities	$ 14,105,521	$ 28,088,103

This item presents net unrealized gains (losses) on available-for-sale securities after adjustment for the impact on deferred acquisition costs and deferred tax benefit (expense).

No definition available.

Name:	ihrc_AvailableforsaleSecuritiesNetUnrealizedGain
Namespace Prefix:	ihrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant