Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Loans held for sale at fair value	$ 747,593	$ 1,248,935
Other real estate owned, portion covered under Loss Sharing Agreements with the FDIC	$ 6,953	$ 4,109
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	24,756,411	18,507,121
Common stock, shares outstanding	24,224,151	18,459,502
Treasury stock, shares	532,260	47,619