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Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Assets of consolidated variable interest entities $ 644,990 $ 333,705
Liabilities of consolidated variable interest entities $ 417,688 $ 176,216
Preferred stock, par value (in dollars per share) $ 1 $ 1
Preferred stock, shares authorized (in shares) 5,996,240 6,029,100
Preferred stock, shares issued (in shares) 41,200 32,000
Preferred stock, shares outstanding (in shares) 41,200 32,000
Preferred stock, aggregate liquidation preference $ 1,030,000 $ 800,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 750,000,000 750,000,000
Common stock, shares issued (in shares) 425,646,380 425,034,113
Common stock, shares outstanding (in shares) 425,646,380 425,034,113