Residential Loans at Amortized Cost, Net Residential Loans at Amortized Cost, Net - Additional Information (Details)	3 Months Ended
Mar. 31, 2015
Receivables [Abstract]
Minimum Period After Which Residential Loans Are Placed On Nonaccrual Status	90 days
Minimum Duration For Past Due Residential Loans To Be Considered As Non Performing	30 days

Minimum duration for past due residential loans to be considered as non-performing.

No definition available.

Name:	wac_MinimumDurationForPastDueResidentialLoansToBeConsideredAsNonPerforming
Namespace Prefix:	wac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration