Percentage of cash rate of interest payable.

No definition available.

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Namespace Prefix:	pri_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of when the fee for available but unused credit capacity is required to be paid (for example, annually, quarterly, or monthly).

+ References

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Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Debt - Narrative (Details) - USD ($)					3 Months Ended
Debt - Narrative (Details) - USD ($)	Jul. 01, 2022	Apr. 01, 2022	Jan. 27, 2022	Jul. 01, 2021	Mar. 31, 2022
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 200,000,000.0
Debt instrument maturity date					Jun. 22, 2026
Debt instrument, frequency of commitment fee payable					quarterly
Amount withdraw From revolving credit facilites					$ 0
Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 1,500,000,000
Maximum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, commitment fee percentage					0.225%
Maximum [Member] \| LIBOR Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin					1.625%
Maximum [Member] \| Base Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin					0.625%
Minimum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, commitment fee percentage					0.10%
Minimum [Member] \| LIBOR Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin					1.00%
Minimum [Member] \| Base Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate margin					0.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 600,000,000.0
Debt instrument, interest rate, stated percentage					2.80%
Debt instrument maturity date					Nov. 19, 2031
Unsecured Subordinated Note [Member] \| Etelequote Bermuda [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 15,000,000.0
Debt instrument maturity date					Jul. 01, 2022
Rate of interest payable				1.50%
Repayments of lines of credit			$ 9,000,000.0
Unsecured Subordinated Note [Member] \| Etelequote Bermuda [Member] \| Forecast [Member]
Debt Instrument [Line Items]
Repayments of lines of credit	$ 2,600,000
Unsecured Subordinated Note [Member] \| Etelequote Bermuda [Member] \| Subsequent Event
Debt Instrument [Line Items]
Repayments of lines of credit		$ 3,400,000
Surplus Note [Member]
Debt Instrument [Line Items]
Debt instrument, face amount					$ 1,400,000,000
Debt instrument, interest rate, stated percentage					4.50%
Debt instrument maturity date					Dec. 31, 2030