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Securities Financing Including Redeemable Preferred Stocks - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 19, 2016
Sep. 30, 2016
Sep. 30, 2016
Class Of Stock [Line Items]      
Liquidated damages percentage     0.25%
Additional liquidated damages percentage     0.25%
Maximum increase of liquidated damages     1.00%
Aggregate liquidated damages percentage     3.00%
Series E Redeemable Preferred Stock [Member]      
Class Of Stock [Line Items]      
Redemption of preferred stock, shares     (70,232)
Redemption of preferred stock     $ (70,232)
Preferred stock cumulative dividend rate     14.00%
Participating right in dividends and liquidating distributions expressed in number of common shares     303,646
Temporary equity, accretion to redemption value, adjustment   $ 9,300  
Series E Redeemable Preferred Stock [Member] | Basic [Member]      
Class Of Stock [Line Items]      
Temporary equity, accretion to redemption earning per share, reduction   $ 0.34 $ 0.34
Series E Redeemable Preferred Stock [Member] | Diluted [Member]      
Class Of Stock [Line Items]      
Temporary equity, accretion to redemption earning per share, reduction   $ 0.37 $ 0.37
Series E Redeemable Preferred Stock [Member] | Climate Control Group [Member]      
Class Of Stock [Line Items]      
Redemption of preferred stock, shares 70,232    
Redemption of preferred stock $ 80,000    
Redeemable preferred stock, liquidation preference $ 1,700    
Liquidation preference per share $ 1,000    
Preferred Stock, Liquidation Preference, Value $ 78,300    
Preferred stock, shares outstanding 139,768    
Series F Redeemable Preferred Stock [Member]      
Class Of Stock [Line Items]      
Common stock voting rights shares   456,225 456,225
Voting rights description     As of September 30 2016, the Series F Redeemable Preferred has voting rights (the “Series F Voting Rights”) to vote as a single class on all matters which the common stock have the right to vote and is entitled to a number of votes equal to 456,225 shares of our common stock.
Series E and Series F Redeemable Preferred Stock [Member]      
Class Of Stock [Line Items]      
Number of common shares into which warrants may be converted   4,103,746 4,103,746
Common stock, par value   $ 0.10 $ 0.10
Warrants exercised period     2016-05
Common stock issued, cashless exercise of warrants     4,103,746
Shares surrendered by holder in payment of exercise price     34,422