Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Consolidated Balance Sheets
Investment securities held at fair value	$ 321,533	$ 403,703
Intangible assets held at fair value	$ 95,492	$ 119,698
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	242,218,855	241,044,775
Common stock, shares outstanding	237,611,970	237,490,779
Treasury stock, shares	4,606,885	3,553,996