Related Party Transactions and Relationships and Transactions With Certain Other Parties (Details)

6 Months Ended

Jun. 30, 2013

Mr. Chunfeng Tao [Member]

Parties to the related party transactions

Relationship

Majority stockholder

Mr. Jicun Wang [Member]

Parties to the related party transactions

Relationship

Principal stockholder

Mr. Peijun Chen [Member]

Parties to the related party transactions

Relationship

Principal stockholder

Ms. Sumei Chen [Member]

Parties to the related party transactions

Relationship

Member of the Company's Board of Supervisors and spouse of Mr. Wang

Ms. Yushui Huang [Member]

Parties to the related party transactions

Relationship

Vice President of Administration, Ningbo Keyuan

Ningbo Pacific Ocean Shipping Co., Ltd (Ningbo Pacific) [Member]

Parties to the related party transactions

Relationship

100% ownership by Mr. Wang

Ningbo Xinhe Logistic Co., Ltd (Ningbo Xinhe) [Member]

Parties to the related party transactions

Relationship

10% ownership by Ms. Huang

Ningbo Kunde Petrochemical Co, Ltd. (Ningbo Kunde) [Member]

Parties to the related party transactions

Relationship

Mr. Tao’s mother was a 65% nominee shareholder for Mr. Hu, a third party through September 2011