Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Loans held for sale, at fair value	$ 403,288	$ 363,275
Common stock, par value (in usd per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued	220,171,163	220,171,091
Common stock, shares outstanding	220,171,163	220,171,091
Cash And Due From Banks
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 89,003	$ 58,813
Interest Bearing Deposits And Temporary Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 575	$ 3,938