Significant Accounting Policies - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2014
Accounting Policies [Abstract]
Performance Fees Earned in Connection with Equity Method Investment	$ 34.2	$ 34.2

Performance Fees Earned in Connection with Equity Method Investment

No definition available.

Name:	wac_PerformanceFeesEarnedinConnectionwithEquityMethodInvestment
Namespace Prefix:	wac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration