Financial Aid Programs - Additional Information (Detail)	12 Months Ended
Dec. 31, 2014
Regulated Operations [Abstract]
Percentage of revenue determined on cash accounting basis	80.00%

Percentage of total cash revenue received from Title IV Programs.

No definition available.

Name:	esi_PercentageOfCashRevenueFromFederalPrograms
Namespace Prefix:	esi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration