Acquisitions - Additional Information (Detail) (USD $)			0 Months Ended	1 Months Ended		3 Months Ended		6 Months Ended				0 Months Ended	1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Oct. 30, 2013 Everbank Financial Corp [Member]	May 31, 2014 Everbank Financial Corp [Member]	Mar. 31, 2014 Everbank Financial Corp [Member]	Jun. 30, 2014 Everbank Financial Corp [Member]	Jun. 30, 2013 Everbank Financial Corp [Member]	Jun. 30, 2014 Everbank Financial Corp [Member]	Jun. 30, 2013 Everbank Financial Corp [Member]	May 01, 2014 Everbank Financial Corp [Member]	Oct. 30, 2013 Everbank Financial Corp [Member] Computer Software, Intangible Asset [Member]	Dec. 10, 2013 M S R Purchase [Member]	Jun. 30, 2014 M S R Purchase [Member]	Apr. 30, 2014 M S R Purchase [Member]	Dec. 31, 2013 M S R Purchase [Member]	Mar. 31, 2014 M S R Purchase [Member]
Business Acquisition [Line Items]
Estimated purchase price			$ 83,400,000								$ 1,900,000
Other payments to acquire business			16,700,000	123,400,000	44,700,000								20,000,000	73,200,000	165,000,000
Residential loans of securitization trusts, principal balance	252,080,666,000	217,961,136,000			16,500,000,000											27,600,000,000
Servicing assets recorded					58,680,000	0	0	58,680,000	0
Mortgage servicing rights purchase price												330,000,000
Assets
Servicer and protective advances										163,160,000
Servicing rights										58,680,000
Premises and equipment										1,866,000
Total assets acquired										223,706,000
Liabilities
Payables and accrued liabilities										924,000
Total liabilities assumed										924,000
Fair value of net assets acquired										$ 222,782,000