Receivables from and Payables to Brokers, Dealers and Clearing Organizations - Additional Information (Details)	Mar. 31, 2020 USD ($)
Pershing clearing arrangement
Schedule Of Compliance With Regulatory Capital Requirements For Broker Dealer [Line Items]
Excess net capital required	$ 120,000,000

The amount of excess net capital which the reporting entity's U.S. broker dealer subsidiary is required to maintain in order to maintain compliance with the debt instrument.

No definition available.

Name:	pipr_DebtInstrumentCovenantComplianceExcessNetCapitalRequirement
Namespace Prefix:	pipr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant