Servicing of Residential Loans - Servicing Revenue and Fees (Parenthetical) (Detail) (USD $) In Millions, 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
Servicing Asset At Amortized Value Additional Disclosures [Abstract]
Late fees	$ 10.3	$ 9.7	$ 22.6	$ 17.0	$ 39.9	$ 16.2	$ 4.7