CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments at cost	$ 196,402	$ 167,740
Allowance for losses for loans held for investment	$ 112,507	$ 83,842	$ 68,081	$ 69,189
Preferred stock, stated value (in dollars per share)	$ 0.20	$ 0.20
Preferred stock, shares authorized	20,000,000	20,000,000
Common stock, par value (in dollars per share)	$ 0.20	$ 0.20
Common stock, shares authorized	1,125,000,000.000	1,125,000,000.000
Common stock, shares issued	430,700,000	424,800,000
Accumulated other comprehensive loss tax benefit	$ (9,949)	$ (7,186)
Common stock held in treasury	4,400,000	1,400,000
Series A Preferred Stock
Preferred stock, stated value (in dollars per share)	$ 50	$ 50
Preferred stock, shares issued	3,300,000	3,300,000
Series B Preferred Stock
Preferred stock, stated value (in dollars per share)	$ 100	$ 100
Preferred stock, shares issued	4,000,000	4,000,000