FAIR VALUE MEASUREMENTS (Details Textuals) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value Disclosures [Abstract]
Cash and cash equivalents, cash	$ 23.4	$ 20.6
Term loan and revolving credit facility	$ 70.6	$ 58.6

Unrestricted cash available for day-to-day operating needs, for an entity that has cash equivalents, but does not aggregate cash equivalents with cash in this note disclosure.

No definition available.

Name:	inap_CashAtCarryingValue
Namespace Prefix:	inap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant