Advance payments and others (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Advance payments and others - unrelated parties		$ 13,307	$ 10,203
Less: allowance for doubtful accounts - unrelated parties	[1]	(1,072)	0
Advance payments and others, net - unrelated parties		12,235	10,203
Advance payments and others - related parties	[2]	31,397	624
Total advance payments and others		$ 43,632	$ 10,827

[1] Provision for the doubtful accounts amounted to $1.1 million and nil for the nine months ended September 30, 2017 and 2016, respectively.

[2] On March 16, 2017, in order to generate higher returns for the Company’s idle cash, one of the Company's subsidiaries, Hubei Henglong, lent RMB 200.0 million (equivalent to $30.1 million as of September 30, 2017) to Henglong Real Estate, one of the Company's related parties, through an independent financial institution by way of an entrusted loan. The term of the loan is one year and the annual interest rate is 6.35%.