Segment Information - Identifiable Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	$ 2,217,221	$ 1,763,958
Operating Segments | North America
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	1,149,376	1,141,084
Operating Segments | Europe & Africa
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	570,709	511,037
Operating Segments | Australia & New Zealand
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	50,464	60,416
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	$ 446,672	$ 51,421