Restricted Cash (Narrative) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Restricted Cash And Investments Abstract
Certificates Of Deposits Oriental International Banking and Oriental Overseas	$ 300,000	$ 300,000
Reserve required by local Goverment	$ 152,800,000	$ 148,900,000

Cash deposited in a special reserve account for the exclusive benefit of government demand deposits pursuant to local Government Regulations

No definition available.

Name:	ofg_ReserveRequiredByLocalGoverment
Namespace Prefix:	ofg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant