Goodwill and Intangible Assets - Summary of Goodwill by Reporting Unit (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Goodwill [Line Items]
Beginning balance	$ 85,856
Ending balance	85,856
Reportable Subsegments [Member]
Goodwill [Line Items]
Beginning balance	85,856
Changes
Ending balance	85,856
Reportable Subsegments [Member] | European Business Segment [Member]
Goodwill [Line Items]
Beginning balance	84,057
Changes
Ending balance	84,057
Reportable Subsegments [Member] | U.S. Business segment [Member]
Goodwill [Line Items]
Beginning balance	1,799
Changes
Ending balance	$ 1,799