Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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+ Details

Related Parties - (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Related Parties - (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Frankfurt JV
Related Party Transaction [Line Items]
Revenue	$ 800		$ 1,900
Makespace
Related Party Transaction [Line Items]
Revenue	$ 8,100	$ 7,100	$ 15,600	$ 13,900