Net investment income increased $2.2 million, or 21.5%, to $12.5 million for the year ended December 31, 2018, as compared to $10.3 million for the year ended December 31, 2017. The increase in net investment income was primarily due to the growth in our fixed income portfolio including a re-allocation of $30 million of equity investments into fixed income securities during the third quarter of 2017. The increase was also due to the improvement in the yield on our fixed income portfolio as a result of portfolio repositioning during the first quarter of 2017, particularly the sale of tax-free municipal bonds, the proceeds of which were reinvested in taxable municipal and corporate fixed income securities with higher coupon rates.
Historically, we have met our liquidity requirements primarily through cash generated from operations. On March 5, 2019, the Company closed on an offering of $100 million of Senior Unsecured Notes due 2029, which bear interest at the annual rate of 7.5%. The net proceeds of the offering were in part used to redeem all $45 million of the Company's Senior Unsecured Fixed Rate Notes due 2022 and the Company's Senior Notes due 2027. Additionally, the remaining cash from the offering was used to purchase the Maison Companies and for other general corporate purposes, including potential repurchases of shares of our common stock and managing the capital needs of our subsidiaries. Refer to Notes 3 and 8 of the notes to our Consolidated Financial Statements set forth in Part II, Item 8. Financial Statements and Supplementary Data of this Annual Report, for additional information regarding the 2029 Notes as well as the acquisition of the Maison Companies.
We recognize premiums as revenue on a pro-rata basis over the term of an insurance policy. Assumed reinsurance premiums written and earned are based on reports received from ceding companies for pro-rata treaty contracts and are generally recorded as written based on contract terms for excess-of-loss and quota-share contracts. Premiums are earned ratably over the terms of the related coverage.
In the absence of sufficiently credible internally-derived historical information, each of the above actuarial assumptions may also incorporate data from the insurance industries as a whole, or peer companies writing substantially similar coverages. Data from external sources may be used to set expectations, as well as assumptions regarding loss frequency or severity relative to an exposure unit or claim, among other actuarial parameters. Assumptions regarding the application or composition of peer group or industry reserving parameters require substantial judgment.
Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and operating loss, capital loss and tax-credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income or expense in the period that includes the enactment date. Such a change occurred in the fourth quarter of 2017. Refer to Note 9 of the notes to our Consolidated Financial Statements set forth in Part II, Item 8. Financial Statements and Supplementary Data of this Annual Report, for additional information regarding our income taxes.
Ceded premiums written are recorded in accordance with applicable terms of the various reinsurance contracts and ceded premiums earned are charged against revenue over the period of the various reinsurance contracts. This also generally applies to reinstatement premiums paid to a reinsurer, which arise when contractually-specified ceded loss triggers have been breached.
The Company holds some of its debt securities as available-for-sale and as such, these securities are recorded at fair value. The Company continually monitors the difference between cost and the estimated fair value of its investments, which involves uncertainty as to whether declines in value are temporary in nature. If the decline of a particular investment is deemed temporary, the Company records the decline as an unrealized loss in shareholders’ equity. If the decline is deemed to be other than temporary, the Company will write the security’s cost-basis or amortized cost-basis down to the fair value of the investment and recognizes an OTTI loss in the Company’s consolidated statement of operations. Additionally, any portion of such decline related to debt securities that is believed to arise from factors other than credit will be recorded as a component of other comprehensive income rather than charged against income. The Company did not have any OTTI losses on its available-for-sale securities for the years ended December 31, 2019, 2018 and 2017, respectively.
Given the December 2, 2019 acquisition of the Maison Companies, the Company and PIH agreed to combine FNIC, MNIC, and MIC under a single reinsurance program allowing the carriers to capitalize on efficiencies, spread of risk and scale.
development primarily related to the 2016 accident year in the state of Georgia. The homeowners unfavorable development primarily related to the continued impact from assignment of benefits ("AOB") and related ligation costs in the state of Florida.
During the year ended December 31, 2017, the Company experienced unfavorable loss and LAE reserve development on prior accident years primarily in its all other peril homeowners coverage in Florida. In the first half of 2016, the Company began to experience a new and higher level of AOB claims both in frequency and severity in our homeowners business in Florida, which caused adverse experience on the loss activity in accident years 2015 and 2016. This increased level of AOB claims was the significant driver in the Company’s decision to increase the Company’s 2015 accident year reserves related to the Company’s homeowners Florida policies.
The following tables provide incurred losses and ALAE and cumulative paid losses and ALAE, net of reinsurance, for the prior 10 accident years, and the total of IBNR reserves plus expected development on reported claims and the cumulative number of reported claims (in thousands, except number of reported claims), as of the most recent reporting period, by the Company’s significant lines of business, which are homeowners, commercial general liability and automobile.
The following table provides supplementary information about the average annual percentage payout of incurred losses and ALAE, net of reinsurance, for homeowners policies, as of December 31, 2019:
In November 2019, our Board of Directors declared a $0.09 per common share dividend, payable in December 2019, to shareholders of record on November 15, 2019. amounting to $1.2 million.