Variable Interest Entities - Narrative (Details)	12 Months Ended
Jan. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Monthly fee received (annualized) (as percent)	4.75%

Variable Interest Entity, Monthly Servicing Fee, Percent of Outstanding Securitized Receivables

No definition available.

Name:	conn_VariableInterestEntityMonthlyServicingFeePercentofOutstandingSecuritizedReceivables
Namespace Prefix:	conn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration