Income Tax Provision - Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax expense	$ 6,172,000	$ 3,604,000	$ 14,370,000	$ 11,653,000
Effective tax rate			23.00%	36.00%	38.00%
Charges for Discrete Items			4,000,000	6,000,000
Estimated Annual Income Tax Rate			29.00%
U.S. statutory tax rate			35.00%	35.00%
Domestic pre-tax income/(loss)	(3,000,000)		1,000,000
Foreign pre-tax income/(loss)	29,000,000		62,000,000
Tax holidays			3,000,000	3,000,000
Tax holidays basic EPS			$ 0.06	$ 0.06
Tax holidays diluted EPS			$ 0.06	$ 0.06
Unrecognized tax benefits	$ 21,000,000		$ 21,000,000
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.