Non-current liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Liabilities, Noncurrent [Abstract]

Summary of Non-Current Liabilities

Non-current liabilities consists of the following:

	As of
	December 31, 2017		December 31, 2016
Derivative instruments	$	322	$	828
Unrecognized tax benefits	892		3,640
Deferred rent	8,176		7,237
Retirement benefits	3,377		1,977
Others	3,435		1,137
Non-current liabilities	$	16,202	$	14,819