Income Tax Provision - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 6,593	$ 6,172	$ 16,179	$ 14,370
Effective tax rate			34.10%	22.90%	23.70%
Estimated Annual Income Tax Rate			35.00%
Domestic pre-tax income/(loss)	(3,000)		$ (5,000)
Foreign pre-tax income/(loss)	13,000		53,000
Tax holidays			$ 2,000	$ 3,000
Tax holidays basic EPS			$ 0.03	$ 0.06
Tax holidays diluted EPS			$ 0.03	$ 0.06
Unrecognized tax benefits	$ 20,000		$ 20,000
Significant Change in Unrecognized Tax Benefits, Nature of Event			It is reasonably possible that the amount of the unrecognized benefit with respect to certain of the Company’s unrecognized tax positions will significantly increase or decrease within the next 12 months.
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range Not Possible			At this time, an estimate of the range of the reasonably possible outcomes cannot be made.