Principles of Consolidation (Details) $ in Billions	3 Months Ended
Mar. 31, 2021 USD ($) location
Principles of Consolidation
Number of locations in Pennsylvania	15
Number of locations in state Maryland	1
Assets under Management, Carrying Amount \| $	$ 2.5

The carrying amount of assets an investment adviser manages on behalf of investors.

No definition available.

Name:	us-gaap_AssetsUnderManagementCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant