Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Consolidated Balance Sheets
Investment securities held at fair value	$ 290,622	$ 297,638
Intangible assets held at fair value	$ 33,781	$ 55,082
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	265,406,623	263,893,806
Common stock, shares outstanding	260,799,738	259,286,921
Treasury stock, shares	4,606,885	4,606,885