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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Taxes
Unrecognized tax benefits	$ 4,100
Unrecognized tax benefits would impact the effective tax rate	3,500
Interest accrued	$ 600
Effective tax rate from operations	(44.80%)	21.50%
(Benefit from) provision for income taxes	$ (518)	$ 4,259
Effective U.S corporate tax rate	21.00%		35.00%
Transition tax			$ 40,300
Other Long-term Liabilities
Income Taxes
Transition tax	$ 36,800		36,800
U.S
Income Taxes
Cash and cash equivalents and short-term investments	$ 303,300		293,800
U.S | Earliest Tax Year
Income Taxes
Tax years subject to examination	2014
Germany | Earliest Tax Year
Income Taxes
Tax years subject to examination	2016
Poland | Earliest Tax Year
Income Taxes
Tax years subject to examination	2013
China | Earliest Tax Year
Income Taxes
Tax years subject to examination	2013
Spain | Earliest Tax Year
Income Taxes
Tax years subject to examination	2014
United Kingdom | Earliest Tax Year
Income Taxes
Tax years subject to examination	2016
Foreign
Income Taxes
Cash and cash equivalents and short-term investments	$ 392,200		$ 381,400

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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