Related Party Transactions and Relationships and Transactions With Certain Other Parties (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Guarantees for bank loans from other certain parties
Guarantee provided during the period	$ 94,112	$ 141,062	$ 94,112	$ 161,688
Bank loans guaranteed	311,971		311,971		153,361
Ningbo Litong [Member]
Guarantees for bank loans from other certain parties
Guarantee provided during the period	62,056	30,000	62,056	50,626
Bank loans guaranteed	145,422		145,422		30,710
Ningbo Kewei [Member]
Guarantees for bank loans from other certain parties
Guarantee provided during the period	32,056	111,062	32,056	111,062
Bank loans guaranteed	$ 166,549		$ 166,549		$ 122,651