00100 - Statement - Statements of Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Statement of Changes in Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Form 5500 - Reconciliation of Net Assets Available for Benefits per the Statements of Net Assets Available for Benefits to the Form 5500 (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - Form 5500 - Reconciliation of Statement of Changes in Net Assets Available for Benefits to the Form 5500 (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Description of the Plan link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Income Tax Status link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Interest in PSSVSA link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Form 5500 link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Schedule H, Line 4i - Schedule of Assets link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - Disclosure - Description of the Plan (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - Interest in PSSVSA (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Form 5500 (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - Description of the Plan - Contributions (Details) link:presentationLink link:calculationLink link:definitionLink 40102 - Disclosure - Description of the Plan - Vesting (Details) link:presentationLink link:calculationLink link:definitionLink 40103 - Disclosure - Description of the Plan - Forfeitures (Details) link:presentationLink link:calculationLink link:definitionLink 40104 - Disclosure - Description of the Plan - Participant Loans (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Income Tax Status (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) - Valuation Hierarchy (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) - Determination of Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) - Assets Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) - Changes in Level 3 Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 40405 - Disclosure - Fair Value of Financial Instruments (excluding PSSVSA) - Quantitative Information about Level 3 Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Interest in PSSVSA (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - Interest in PSSVSA - Net assets (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Schedule H, Line 4i - Schedule of Assets (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Schedule H, Line 4i - Schedule of Assets Default (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink