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CONSOLIDATED BALANCE SHEETS (Parenthetical)
Jun. 30, 2017
$ / shares
shares
Jun. 30, 2017
£ / shares
shares
Common shares, par value per share | $ / shares $ 1.00  
Ordinary share, authorized 1 1
Ordinary share, subscribed 1 1
Subscriber Shares    
Common shares, par value per share | (per share) $ 1.28  
Ordinary share, authorized 50,000 50,000
Ordinary share, subscribed 50,000 50,000
Redeemable shares    
Redeemable shares, par value per share | (per share) $ 1.28 £ 1
Redeemable shares, authorized 50,000 50,000
Redeemable shares, subscribed 50,000 50,000