Summary of Significant Accounting Policies - Merger, litigation and non-routine costs, net (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Merger, litigation and non-routine costs, net:
Merger costs	$ 9,616	$ 0	$ 22,289	$ 0
Legal fees and settlements	(171)	105	174	(6,106)
Insurance recoveries	0	0	(6,345)	(2,471)
Total	$ 9,445	$ 105	$ 16,118	$ (8,577)

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

No definition available.

Name:	us-gaap_BusinessCombinationIntegrationRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration