Summary of Accounting policies - Additional Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Disposal Transactions Closing in October 2019 [Abstract]
Number of Disposal Transactions	4	4
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Losses, Current, Disclosure	$ 2,104	$ 2,104	$ 1,337
Provision for Other Credit Losses		794
Accounts Receivable, Allowance for Credit Loss, Recovery		450
Allowance for Loan and Lease Losses, Write-offs		$ (477)