Consolidated Balance Sheet - Unaudited (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Loans held for sale at fair value	$ 1,931,781	$ 1,939,659
Preferred stock, par value (usd per share)	$ 1.0	$ 1.00
Preferred stock, liquidation preference (usd per share)	$ 25.00	$ 25.00
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, shares issued (shares)	9,000,000	9,000,000
Preferred stock, shares outstanding (shares)	9,000,000	9,000,000
Common stock, par value (usd per share)	$ 1.00	$ 1.00
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	32,199,903	31,912,763
Common stock, shares outstanding (shares)	31,669,643	30,820,177
Treasury stock, shares (shares)	530,260	530,260
Significant Other Observable Inputs (Level 2)
Loans held for sale at fair value	$ 1,931,781	$ 1,795,294