Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation. We prepare our financial statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). These principles are established primarily by the Financial Accounting Standards Board (“FASB”). The accompanying unaudited condensed consolidated financial statements contain all adjustments, generally consisting of normal recurring accruals, which are necessary to fairly present the balance sheets as of September 30, 2020 and December 31, 2019, the statements of income, comprehensive income, and stockholders’ equity for the three and nine months ended September 30, 2020 and 2019, and cash flows for the nine months ended September 30, 2020 and 2019. Results of operations for interim periods are not necessarily indicative of results for the entire year or of the results to be expected in future periods. These unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are sufficient to make the information not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto that are included in our Annual Report on Form 10-K for the year ended December 31, 2019 (“2019 Annual Report”).
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect financial statement balances, revenues and expenses and cash flows, as well as the disclosure of contingent assets and liabilities. Management considers available facts and knowledge of existing circumstances when establishing the estimates included in our financial statements. The most significant items that involve a greater degree of accounting estimates and actuarial determinations subject to change in the future are the valuation of investments, deferred policy acquisition costs (“DAC”), future policy benefit reserves and corresponding amounts recoverable from reinsurers, and income taxes. Estimates for these and other items are subject to change and are reassessed by management in accordance with U.S. GAAP. Actual results could differ from those estimates.
Consolidation	Consolidation. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and those entities required to be consolidated under U.S. GAAP. All material intercompany profits, transactions, and balances among the consolidated entities have been eliminated.
Reclassifications	Reclassifications. Certain reclassifications have been made to prior-period amounts to conform to current-period reporting classifications. These reclassifications had no impact on net income or total stockholders’ equity.
Significant Accounting Policies	Significant Accounting Policies. All significant accounting policies remain unchanged from the 2019 Annual Report unless otherwise described.
New Accounting Principles	New Accounting Principles. In June 2016, the FASB issued Accounting Standards Update No. 2016-13 (“ASU 2016-13”), Financial Instruments—Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments (“ASC 326”). ASC 326 introduces new guidance for accounting for credit losses on financial instruments within its scope, including reinsurance recoverables, by replacing the current approach that delays recognition until it is probable a loss has been incurred with a new approach that estimates an allowance for anticipated credit losses on the basis of an entity’s own expectations. The objective of the new approach for estimating credit losses is to require consideration of a broader range of forward-looking information, which is expected to result in earlier recognition of credit losses on financial instruments. Available-for-sale (“AFS”) securities are excluded from the scope of financial instruments that require measurement of credit losses on the basis of a forward-looking expected loss estimate under ASC 326. The incurred probable loss approach for measuring losses on AFS securities in the condensed consolidated statement of income will remain under ASC 326, however, an entity will be allowed to reverse credit losses previously recognized in an allowance for AFS securities in situations where the estimate of credit losses on those securities has declined. The amendments in ASC 326 also preclude an entity from considering the length of time an AFS security has been in an unrealized loss position to avoid recording a credit loss and remove the requirement to consider recoveries or declines in fair value after the balance sheet date. We adopted the amendments in ASC 326 as of the January 1, 2020 application date through a cumulative-effect adjustment to beginning retained earnings of $1.2 million, net of taxes. Furthermore, the adoption of ASC 326 did not result in any material changes to impairment losses recognized in our condensed consolidated statement of income for AFS securities. Refer to Note 3 (Investments) and Note 5 (Reinsurance) for more information on credit losses. Future Application of Accounting Standards. In August 2018, the FASB issued Accounting Standards Update No. 2018-12, Financial Services—Insurance (Topic 944) — Targeted Improvements to the Accounting for Long-Duration Contracts (“ASU 2018-12”). The amendments in this update change accounting guidance for insurance companies that issue long-duration contracts, including term life insurance. ASU 2018-12 requires companies that issue long-duration insurance contracts to update assumptions used in measuring future policy benefits, including mortality, disability, and persistency, at least annually instead of locking those assumptions at contract inception and reflecting differences in assumptions and actual performance as the experience occurs. ASU 2018-12 also includes changes to how insurance companies that issue long-duration contracts amortize DAC and determine and update the discount rate assumptions used in measuring future policy benefits reserves while increasing the level of financial statement disclosures required. The guidance in ASU 2018-12 will be applied to the earliest period presented in the condensed consolidated financial statements beginning on the effective date. On September 30, 2020, the FASB voted to defer the effective date of ASU 2018-12 by an additional year, moving the effective date from January 1, 2022 to January 1, 2023. The adoption of ASU 2018-12 will have an impact on our consolidated financial statements and related disclosures and will require changes to certain of our processes, systems, and controls. We are currently working on processes that will allow us to obtain the requisite data, modify our valuation system, and develop key assumptions that will be necessary to evaluate and implement this standard. As such, we are unable to determine the magnitude of the impact ASU 2018-12 will have on our condensed consolidated financial statements at this time. In December 2019, the FASB issued Accounting Standards Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The guidance in ASU 2019-12 is effective for the Company beginning January 1, 2021. We do not expect the implementation of ASU 2019-12 to have a material effect on our condensed consolidated financial statements. Recently-issued accounting guidance not discussed above is not applicable, is immaterial to our condensed consolidated financial statements, or did not or is not expected to have a material impact on our business.

Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Basis of Presentation. We prepare our financial statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). These principles are established primarily by the Financial Accounting Standards Board (“FASB”).

The accompanying unaudited condensed consolidated financial statements contain all adjustments, generally consisting of normal recurring accruals, which are necessary to fairly present the balance sheets as of September 30, 2020 and December 31, 2019, the statements of income, comprehensive income, and stockholders’ equity for the three and nine months ended September 30, 2020 and 2019, and cash flows for the nine months ended September 30, 2020 and 2019. Results of operations for interim periods are not necessarily indicative of results for the entire year or of the results to be expected in future periods.

These unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are sufficient to make the information not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto that are included in our Annual Report on Form 10-K for the year ended December 31, 2019 (“2019 Annual Report”).

Use of Estimates

Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect financial statement balances, revenues and expenses and cash flows, as well as the disclosure of contingent assets and liabilities. Management considers available facts and knowledge of existing circumstances when establishing the estimates included in our financial statements. The most significant items that involve a greater degree of accounting estimates and actuarial determinations subject to change in the future are the valuation of investments, deferred policy acquisition costs (“DAC”), future policy benefit reserves and corresponding amounts recoverable from reinsurers, and income taxes. Estimates for these and other items are subject to change and are reassessed by management in accordance with U.S. GAAP. Actual results could differ from those estimates.

Consolidation

Consolidation. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and those entities required to be consolidated under U.S. GAAP. All material intercompany profits, transactions, and balances among the consolidated entities have been eliminated.

Reclassifications

Reclassifications. Certain reclassifications have been made to prior-period amounts to conform to current-period reporting classifications. These reclassifications had no impact on net income or total stockholders’ equity.

Significant Accounting Policies

Significant Accounting Policies. All significant accounting policies remain unchanged from the 2019 Annual Report unless otherwise described.

New Accounting Principles

New Accounting Principles. In June 2016, the FASB issued Accounting Standards Update No. 2016-13 (“ASU 2016-13”), Financial Instruments—Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments (“ASC 326”). ASC 326 introduces new guidance for accounting for credit losses on financial instruments within its scope, including reinsurance recoverables, by replacing the current approach that delays recognition until it is probable a loss has been incurred with a new approach that estimates an allowance for anticipated credit losses on the basis of an entity’s own expectations. The objective of the new approach for estimating credit losses is to require consideration of a broader range of forward-looking information, which is expected to result in earlier recognition of credit losses on financial instruments. Available-for-sale (“AFS”) securities are excluded from the scope of financial instruments that require measurement of credit losses on the basis of a forward-looking expected loss estimate under ASC 326. The incurred probable loss approach for measuring losses on AFS securities in the condensed consolidated statement of income

will remain under ASC 326, however, an entity will be allowed to reverse credit losses previously recognized in an allowance for AFS securities in situations where the estimate of credit losses on those securities has declined. The amendments in ASC 326 also preclude an entity from considering the length of time an AFS security has been in an unrealized loss position to avoid recording a credit loss and remove the requirement to consider recoveries or declines in fair value after the balance sheet date. We adopted the amendments in ASC 326 as of the January 1, 2020 application date through a cumulative-effect adjustment to beginning retained earnings of $1.2 million, net of taxes. Furthermore, the adoption of ASC 326 did not result in any material changes to impairment losses recognized in our condensed consolidated statement of income for AFS securities. Refer to Note 3 (Investments) and Note 5 (Reinsurance) for more information on credit losses.

Future Application of Accounting Standards. In August 2018, the FASB issued Accounting Standards Update No. 2018-12, Financial Services—Insurance (Topic 944) — Targeted Improvements to the Accounting for Long-Duration Contracts (“ASU 2018-12”). The amendments in this update change accounting guidance for insurance companies that issue long-duration contracts, including term life insurance. ASU 2018-12 requires companies that issue long-duration insurance contracts to update assumptions used in measuring future policy benefits, including mortality, disability, and persistency, at least annually instead of locking those assumptions at contract inception and reflecting differences in assumptions and actual performance as the experience occurs. ASU 2018-12 also includes changes to how insurance companies that issue long-duration contracts amortize DAC and determine and update the discount rate assumptions used in measuring future policy benefits reserves while increasing the level of financial statement disclosures required. The guidance in ASU 2018-12 will be applied to the earliest period presented in the condensed consolidated financial statements beginning on the effective date. On September 30, 2020, the FASB voted to defer the effective date of ASU 2018-12 by an additional year, moving the effective date from January 1, 2022 to January 1, 2023. The adoption of ASU 2018-12 will have an impact on our consolidated financial statements and related disclosures and will require changes to certain of our processes, systems, and controls. We are currently working on processes that will allow us to obtain the requisite data, modify our valuation system, and develop key assumptions that will be necessary to evaluate and implement this standard. As such, we are unable to determine the magnitude of the impact ASU 2018-12 will have on our condensed consolidated financial statements at this time.

In December 2019, the FASB issued Accounting Standards Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The guidance in ASU 2019-12 is effective for the Company beginning January 1, 2021. We do not expect the implementation of ASU 2019-12 to have a material effect on our condensed consolidated financial statements.

Recently-issued accounting guidance not discussed above is not applicable, is immaterial to our condensed consolidated financial statements, or did not or is not expected to have a material impact on our business.