Goodwill and Other Intangible Assets - Summary of Finite-Lived and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	$ 191,000	$ 191,000
Accumulated Amortization	(47,854)	(41,411)
Finite-lived Intangible Assets, Currency Translation	1,614	4,454
Finite lived Intangible Assets, Net	144,760	154,043
Indefinite lived Intangible Assets, Gross Carrying Amount	14,000	14,000
Indefinite lived Intangible Assets, Currency Translation	41	326
Indefinite lived Intangible Assets, Net	14,041	14,326
Gross Carrying Amount	205,000	205,000
Currency Translation	1,655	4,780
Net	158,801	168,369
Beginning Balance	291,434	304,805
Currency Translation	(5,756)	(13,371)
Ending Balance	285,678	291,434
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	9,000	9,000
Accumulated Amortization	(3,442)	(2,979)
Finite-lived Intangible Assets, Currency Translation	128	237
Finite lived Intangible Assets, Net	$ 5,686	$ 6,258
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	4 years	4 years
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	5 years	5 years
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	$ 15,000	$ 15,000
Accumulated Amortization	(5,737)	(4,964)
Finite-lived Intangible Assets, Currency Translation	213	394
Finite lived Intangible Assets, Net	$ 9,476	$ 10,430
Technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	3 years	3 years
Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	5 years	5 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	$ 167,000	$ 167,000
Accumulated Amortization	(38,675)	(33,468)
Finite-lived Intangible Assets, Currency Translation	1,273	3,823
Finite lived Intangible Assets, Net	$ 129,598	$ 137,355
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	5 years	5 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	10 years	10 years