Contingencies - Additional Information (Detail) € in Millions, $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2018 EUR (€)	Jul. 31, 2018 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Contingencies, settlement agreement, terms			In January 2017, the U.S. Securities and Exchange Commission (the “SEC”) approved the Company’s offers of settlement in connection with the SEC’s investigations of accounting matters leading to the Company’s prior restatement of financial statements and the Company’s review of improper payments with respect to its subsidiary in Brazil. Both investigations were initiated in 2013 and involved matters self-reported to the SEC by the Company. The settlements approved by the SEC resolved these two matters, and included payments totaling $14.4 million by the Company to the SEC of amounts previously accrued and funded into escrow by the Company during 2016. In connection with the Brazil-related settlement, the Company agreed to retain an independent compliance consultant for one year to review and test the Company’s compliance program related to the U.S. Foreign Corrupt Practices Act. The Company’s engagement with its independent compliance consultant began in the first quarter of 2017 and concluded in the first quarter of 2018. In addition, in the fourth quarter of 2017 the Company received a favorable insurance settlement of approximately $6 million associated with prior costs incurred related to these matters, which the Company has recognized within general and administrative expenses.	In January 2017, the U.S. Securities and Exchange Commission (the “SEC”) approved the Company’s offers of settlement in connection with the SEC’s investigations of accounting matters leading to the Company’s prior restatement of financial statements and the Company’s review of improper payments with respect to its subsidiary in Brazil. Both investigations were initiated in 2013 and involved matters self-reported to the SEC by the Company. The settlements approved by the SEC resolved these two matters, and included payments totaling $14.4 million by the Company to the SEC of amounts previously accrued and funded into escrow by the Company during 2016. In connection with the Brazil-related settlement, the Company agreed to retain an independent compliance consultant for one year to review and test the Company’s compliance program related to the U.S. Foreign Corrupt Practices Act. The Company’s engagement with its independent compliance consultant began in the first quarter of 2017 and concluded in the first quarter of 2018. In addition, in the fourth quarter of 2017 the Company received a favorable insurance settlement of approximately $6 million associated with prior costs incurred related to these matters, which the Company has recognized within general and administrative expenses.
Payments for SEC settlements	$ 14.4
Insurance settlements received		$ 6.0
Discontinued operations obligated to make final payment to insurer			$ 1.7
Accrued other long-term liabilities			3.7						€ 3.2
Estimated sales and marketing expense			1.0	€ 0.9	$ 0.9	€ 0.8	$ 0.9	€ 0.8
Freezing amount in cash resulted from court pending legal action issued			$ 2.6							$ 2.6