Effective January 1, 2018, the Company adopted new accounting standards including ASU 2014-09, Revenue from Customers, ASU 2016-01, Financial Instruments and ASU 2018-02, Reporting Comprehensive Income. Refer to Note 1 in the financial statements for further information on the accounting guidance and impact of its adoption on the Company's results and financial position.
Premiums. Gross premiums written were $7,702 million in 2018, an increase of 3% from $7,477 million in 2017. The increase was due to an increase in the Insurance segment of $287 million, partially offset by a decrease in the Reinsurance segment of $62 million. Approximately 78% of policies expiring in 2018 were renewed and 79% of policies expiring in 2017 were renewed.
Real Estate. Real estate is directly owned property held for investment. At December 31, 2018, real estate properties in operation included a long-term ground lease in Washington D.C., a hotel in Memphis, Tennessee, two office complexes in New York City, office buildings in West Palm Beach and Palm Beach, Florida, and an office building in London. In addition, there is a mixed-use project in Washington D.C. under development. The Company expects to fund further development costs for the project with a combination of its own funds and external financing.
Debt. At December 31, 2018, the Company had senior notes, subordinated debentures and other debt outstanding with a carrying value of $2,790 million and a face amount of $2,826 million. The maturities of the outstanding debt are $447 million in 2019, $315 million in 2020, $427 million in 2022, $102 million in 2028, $250 million in 2037, $350 million in 2044, $350 million in 2053, $400 million in 2056 and $185 million in 2058.
Equity securities with readily determinable fair values are measured at fair value, with changes in the fair value recognized in net income within net realized and unrealized gains on investments. (See (Q) Recent accounting pronouncements.)
The accrual of interest on loans receivable is discontinued if the loan is 90 days past due based on the contractual terms of the loan unless the loan is adequately secured and in process of collection. In general, loans are placed on non-accrual status or charged off at an earlier date if collection of principal or interest is considered doubtful. Interest on these loans is accounted for on a cash basis until qualifying for return to accrual status. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured.
In January 2016, the FASB issued ASU 2016-01, Financial Instruments. ASU 2016-01 amends the accounting guidance for financial instruments to require all equity investments with readily determinable fair values to be measured at fair value with changes in the fair value recognized in net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee). The updated guidance was effective for public business entities for annual reporting periods beginning after December 15, 2017 and interim periods within those years. The Company adopted this updated guidance on January 1, 2018 on a prospective basis. The impact of applying this guidance prospectively was a cumulative effect adjustment that increased retained earnings and decreased accumulated other comprehensive income ("AOCI") by offsetting amounts of $291 million, resulting in no net impact to total stockholders' equity. Following the adoption, the Company reports changes in fair value related to equity securities within net realized and unrealized gains on investments.
In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses, which amends the accounting guidance for credit losses on financial instruments. The updated guidance amends the current other-than-temporary impairment model for available-for-sale debt securities by requiring the recognition of impairments relating to credit losses through an allowance account and limits the amount of credit loss to the difference between a security’s amortized cost basis and its fair value. This guidance also applies a new current expected credit loss model for determining credit-related impairments for financial instruments measured at amortized cost. The updated guidance is effective for reporting periods beginning after December 15, 2019. The Company will not be able to determine the impact the adoption of this guidance will have on its results of operations, financial position or liquidity until the year the guidance becomes effective.
In evaluating the real estate loans, the Company considers their credit quality indicators, including loan to value ratios, which compare the outstanding loan amount to the estimated value of the property, the borrower’s financial condition and performance with respect to loan terms, the position in the capital structure, the overall leverage in the capital structure and other market conditions. Based on these considerations, none of the real estate loans were considered to be impaired at December 31, 2018, and accordingly, the Company determined that a specific valuation allowance was not required.