XML 93 R79.htm IDEA: XBRL DOCUMENT v3.8.0.1
Material Partly-Owned Subsidiaries - Accumulated Balances and Profit / (Loss) of Material Non-controlling Interests in Subsidiaries (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of subsidiaries [Line Items]      
Non-controlling interests $ 69,498 $ 61,225  
Profit/(loss) attributable to non-controlling interests 4,808 3,172 $ (1,417)
CTW Consolidated [Member]      
Disclosure of subsidiaries [Line Items]      
Non-controlling interests 64,995 56,380  
Profit/(loss) attributable to non-controlling interests 4,896 3,812 (789)
Shanghai Yayang Electric Co., Ltd. [Member]      
Disclosure of subsidiaries [Line Items]      
Non-controlling interests 1,758 1,450  
Profit/(loss) attributable to non-controlling interests $ (15) $ (181) $ (364)