Segment Information - Identifiable Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	$ 1,809,439	$ 1,763,958
Operating Segments | North America
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	1,248,045	1,141,084
Operating Segments | Europe & Africa
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	463,810	511,037
Operating Segments | Australia & New Zealand
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	55,554	60,416
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Total identifiable assets	$ 42,030	$ 51,421