Supplemental Disclosures of Cash Flow Information - Summary of Supplemental Disclosures of Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Disclosure of Cash Flow Information
Cash paid for interest	$ 316,094us-gaap_InterestPaid	$ 278,679us-gaap_InterestPaid	$ 209,943us-gaap_InterestPaid
Cash paid (received) for taxes	(5,338)wac_CashPaidorRefundReceivedforTaxes	96,849wac_CashPaidorRefundReceivedforTaxes	33,319wac_CashPaidorRefundReceivedforTaxes
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Real estate owned acquired through foreclosure	122,213us-gaap_TransferToOtherRealEstate	107,629us-gaap_TransferToOtherRealEstate	73,513us-gaap_TransferToOtherRealEstate
Residential loans originated to finance the sale of real estate owned	52,130	63,219	58,376
Acquisition of servicing rights	60,406wac_AcquisitionOfMsrPoolNoncash	0wac_AcquisitionOfMsrPoolNoncash	21,011wac_AcquisitionOfMsrPoolNoncash
Issuance of common stock for acquisitions	0us-gaap_StockIssued1	0us-gaap_StockIssued1	41,346us-gaap_StockIssued1
Capitalized Servicing Rights [Member]
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Servicing rights capitalized upon sales of loans	$ 214,285	$ 187,749	$ 0

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The amount of cash paid for interest during the period.

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Mortgage loan related to property sales in noncash investing and financing activities.

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The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

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The fair value of stock issued in noncash financing activities.

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Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.

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Acquisition of MSR pool noncash.

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Cash Paid or Refund Received for Taxes

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