Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Cost	$ 87,003	$ 86,825
Accumulated Amortization	57,543	55,542
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	14,457	14,457
Accumulated Amortization	11,267	10,686
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	68,943	68,943
Accumulated Amortization	45,484	44,484
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	5,294	5,294
Accumulated Amortization	1,286	1,154
Foreign Currency Adjustments [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	(1,691)	(1,869)
Accumulated Amortization	$ (494)	$ (782)