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Fair Value - Summary of Components of Net Fair Value Gains on Reverse Loans and Related HMBS Obligations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net fair value gains (losses) on reverse loans and related HMBS obligations
Interest income on reverse loans	$ 98,258wac_InterestIncomeFromReverseLoans	$ 86,514wac_InterestIncomeFromReverseLoans	$ 195,139wac_InterestIncomeFromReverseLoans	$ 163,781wac_InterestIncomeFromReverseLoans	$ 347,497wac_InterestIncomeFromReverseLoans	$ 44,314wac_InterestIncomeFromReverseLoans
Change in fair value of reverse loans	(8,687)wac_FairValueAdjustmentsOnReverseLoans	14,570wac_FairValueAdjustmentsOnReverseLoans	99,841wac_FairValueAdjustmentsOnReverseLoans	16,108wac_FairValueAdjustmentsOnReverseLoans	(239,417)wac_FairValueAdjustmentsOnReverseLoans	20,716wac_FairValueAdjustmentsOnReverseLoans
Net fair value gains on reverse loans	89,571wac_FairValueGainLossOnReverseLoans	101,084wac_FairValueGainLossOnReverseLoans	294,980wac_FairValueGainLossOnReverseLoans	179,889wac_FairValueGainLossOnReverseLoans	108,080wac_FairValueGainLossOnReverseLoans	65,030wac_FairValueGainLossOnReverseLoans
Interest expense on HMBS related obligations	(91,470)	(79,545)	(182,030)	(149,220)	(321,820)	(41,114)
Change in fair value of HMBS related obligations	28,835	5,192	(68,778)	32,850	334,122	(16,637)
Net fair value gains (losses) on HMBS related obligations	(62,635)	(74,353)	(250,808)	(116,370)	12,302	(57,751)
Net fair value gains on reverse loans and related HMBS obligations	$ 26,936	$ 26,731	$ 44,172	$ 63,519	$ 120,382	$ 7,279	$ 0