XML 98 R82.htm IDEA: XBRL DOCUMENT v3.6.0.2
Securities Financing Including Redeemable Preferred Stocks - Summary of Redeemable Preferred Stock (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Stockholders Equity [Line Items]    
Accumulated dividends $ 27,761 $ 2,287
Series E Redeemable Preferred Stock [Member]    
Stockholders Equity [Line Items]    
Beginning balance $ 177,272  
Beginning balance, shares 210,000  
Accretion relating to liquidation preference on preferred stock $ 12,625  
Accretion for discount and issuance costs on preferred stock 5,631  
Accumulated dividends 27,761 2,287
Redemption of preferred stock $ (70,232)  
Redemption of preferred stock, shares (70,232)  
Dividends paid $ (8,028)  
Ending balance $ 145,029 $ 177,272
Ending balance, shares 139,768 210,000
Series F Redeemable Preferred Stock [Member]    
Stockholders Equity [Line Items]    
Beginning balance, shares 1  
Ending balance, shares 1 1