Noncontrolling Interests Represent Minority Stockholders' Interest In Group's Majority Owned Subsidiaries (Detail)	9 Months Ended
	Sep. 30, 2013
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Ownership Percentage	100.00%
Andatee China Marine Fuel Services Corp
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Andatee China Marine Fuel Services Corp.
Entity Incorporation, State Country Name	Delaware
Ownership Percentage	0.00%
Goodwill Rich International Corp., ("Goodwill Rich")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Goodwill Rich International Corp., (“Goodwill Rich”)
Entity Incorporation, State Country Name	Hong Kong
Ownership Percentage	100.00%
Dalian Fusheng Petrochemical Company ("Fusheng") ("WOFE")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Dalian Fusheng Petrochemical Company ("Fusheng") (“WOFE”)
Entity Incorporation, State Country Name	Dalian,  China
Ownership Percentage	100.00%
Dalian Xingyuan Marine Bunker Co., Ltd ("Xingyuan") ("VIE")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Dalian Xingyuan Marine Bunker Co., Ltd (“Xingyuan”) (“VIE”)
Entity Incorporation, State Country Name	Dalian, China
Ownership Percentage	100.00%
Shangdong Shengfu Petrochemical Company, Ltd.("Shandong Shengfu")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Shangdong Shengfu Petrochemical Company, Ltd.(“Shandong Shengfu”)
Entity Incorporation, State Country Name	Shandong, China
Ownership Percentage	100.00%
Dalian Xifa Petrochemical Company, Ltd.("Dalian Xifa"),
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Dalian Xifa Petrochemical Company, Ltd.(“Dalian Xifa”),
Entity Incorporation, State Country Name	Dalian, China
Ownership Percentage	100.00%
Shandong Xifa Prochemical Company, Ltd. ("Shandong Xifa")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Shandong Xifa Prochemical Company, Ltd. (“Shandong Xifa”)
Entity Incorporation, State Country Name	Shandong, China
Ownership Percentage	100.00%
Shenzhen Shengfu Petrochemical Company, Ltd.( ''Shenzhen Shengfu")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Shenzhen Shengfu Petrochemical Company, Ltd.( “Shenzhen Shengfu”)
Entity Incorporation, State Country Name	Shenzhen, China
Ownership Percentage	100.00%
Donggang Xingyuan Marine Fuel Company ("Donggang Xingyuan"),
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Donggang Xingyuan Marine Fuel Company (“Donggang Xingyuan”),
Entity Incorporation, State Country Name	Donggang, China
Ownership Percentage	100.00%
Rongcheng Zhuoda Trading Co ("Zhuoda")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Rongcheng Zhuoda Trading Co (“Zhuoda”)
Entity Incorporation, State Country Name	Shandong, China
Ownership Percentage	100.00%
Wujiang Xinlang Petrochemical Company ("Xinglang")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Wujiang Xinlang Petrochemical Company ("Xinglang")
Entity Incorporation, State Country Name	Wujiang, China
Ownership Percentage	90.00%
Xiangshan Yongshi Nanlian Petroleum Company ("Nanlian").
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Xiangshan Yongshi Nanlian Petroleum Company (“Nanlian”). (Note A)	[1]
Entity Incorporation, State Country Name	Zhejiang, China	[1]
Ownership Percentage	63.00%	[1]
Rongcheng Xinfa Petroleum Company ("Xinfa")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Rongcheng Xinfa Petroleum Company (“Xinfa”)
Entity Incorporation, State Country Name	Shandong, China
Ownership Percentage	90.00%
Suzhou Fusheng Petrochemical Company ("Suzhou Fusheng")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Suzhou Fusheng Petrochemical Company ("Suzhou Fusheng")
Entity Incorporation, State Country Name	Suzhou, China
Ownership Percentage	61.00%
Hailong Petrochemical Company ("Hailong")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Hailong Petrochemical Company (“Hailong”)
Entity Incorporation, State Country Name	Tianjin, China
Ownership Percentage	52.00%
Rongcheng Mashan Xingyuan("Mashan Xingyuan"
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Rongcheng Mashan Xingyuan (“Mashan Xingyuan”
Entity Incorporation, State Country Name	Shandong, China
Ownership Percentage	52.00%
Shanghai Fusheng Petrochemical Company, Ltd.( "Shanghai Fusheng")
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Shanghai Fusheng Petrochemical Company, Ltd.( “Shanghai Fusheng”)
Entity Incorporation, State Country Name	Shanghai, China
Ownership Percentage	100.00%
Lianyungang Fusheng Petrochemical Co., Ltd. (“Lianyungang Fusheng”)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Lianyungang Fusheng Petrochemical Co., Ltd. (“Lianyungang Fusheng”) (Note B)	[2]
Entity Incorporation, State Country Name	Lianyungang, China	[2]
Ownership Percentage	100.00%	[2]
Lianyungang Xingyuan Marine Bunker Co., Ltd. (“Lianyungang Xingyuan”)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Name of the entity	Lianyungang Xingyuan Marine Bunker Co., Ltd. (“Lianyungang Xingyuan”) (Note B)	[2]
Entity Incorporation, State Country Name	Lianyungang, China	[2]
Ownership Percentage	100.00%	[2]

[1] During the quarter ended September 30, 2013, Dalian Xingyuan acquired the remaining 37% capital shares from Xiangshan Nanlian’s minority shareholder Mr. Chen Wenwei for cash consideration of RMB 11.2 million. Xiangshan Nanlian completed the registration change with the local State Administration of Industry and Commerce (the “SAIC”) on July 29, 2013 to reflect the share structure change. After the acquisition, Xiangshan Nanlian became 100% controlled subsidiary of Dalian Xingyuan. The acquisition was treated as a related party transaction because former minority shareholder Mr. Chen Weiwen still serves as the legal representative of Xiangshan Nanlian after the acquisition. See Note 11 “related party transaction”.

[2] On June 7, 2013, Dalian Fusheng formed a new subsidiary Lianyungang Fusheng Petrochemical Co., Ltd. (“Lianyungang Fusheng”) in the city of Lianyungang under the laws of the PRC with registered capital of $4.69 million (RMB 29,000,000). In addition, on June 7, 2013, Dalian Xingyuan formed a new subsidiary Lianyungang Xingyuan Marine Bunker Co., Ltd. (“Lianyungang Xingyuan”) in the city of Lianyungang under the laws of the PRC with registered capital of $3.4 million (RMB 21,000,000). Both Lianyungang Fusheng and Lianyungang Xingyuan will be engaged in the production, storage, distribution and trading of blended marine fuel oil for cargo and fishing vessels in the PRC.