Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Commitments and Contingencies Disclosure [Line Items]
2015	$ 8,615
2016	3,474
2017	2,451
2018	0
Thereafter	0
Total	14,540
Obligations for investment contracts [Member]
Commitments and Contingencies Disclosure [Line Items]
2015	1,634	[1]
2016	3,269	[1]
2017	2,451	[1]
2018	0	[1]
Thereafter	0	[1]
Total	7,354	[1]
Obligations for purchasing and service [Member]
Commitments and Contingencies Disclosure [Line Items]
2015	6,981
2016	205
2017	0
2018	0
Thereafter	0
Total	$ 7,186

[1] On September 22, 2014, Hubei Henglong entered into an agreement with seven other parties to establish the Venture Fund, under which Hubei Henglong has committed to make investments of 17.9% or RMB50.0 million (equivalent to approximately $8.2 million) into the Venture Fund in three installments. On October 20, 2014, Hubei Henglong made its first capital contribution of RMB5.0 million (equivalent to approximately $0.8 million). The remaining capital commitment of RMB45.0 million (equivalent to approximately $7.4 million) will be paid upon capital calls received from the Venture Fund.