Related Party Transactions and Relationships and Transactions With Certain Other Parties (Details 3)
3 Months Ended
Mar. 31, 2014
Ningbo Xinhe Logistic Co Ltd [Member]
 
Relationships and transactions with certain other parties  
Relationship 10% ownership by Ms. Huang
Ningbo Litong Petrochemical Co., Ltd (Ningbo Litong) [Member] | Certain Other Parties [Member]
 
Relationships and transactions with certain other parties  
Relationship Former 12.75% nominee shareholder of Ningbo Keyuan
Ningbo Anqi Petrochemical Co., Ltd (Ningbo Anqi) [Member] | Certain Other Parties [Member]
 
Relationships and transactions with certain other parties  
Relationship A related party through September 2011 when control transferred
Ningbo Lide Investment Co., Ltd. (Ningbo Lide) (formerly Ningbo Kewei) | Certain Other Parties [Member]
 
Relationships and transactions with certain other parties  
Relationship A related party through September 2011 when control transferred
Ningbo Kunde Petrochemical Co., Ltd (Ningbo Kunde) [Member] | Certain Other Parties [Member]
 
Relationships and transactions with certain other parties  
Relationship A related party through September 2011 when control transferred