Changes in MSRs measured using the fair value method (Parenthetical) (Detail) - USD ($)	6 Months Ended
Jun. 30, 2015
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Purchases	$ 57,269,000
FDIC Assisted Partial Acquisition Of Doral Bank [Member]
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Purchases	$ 54,900,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ServicingAssetsAtFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration