Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies The accompanying unaudited, condensed consolidated financial statements of PICO Holdings, Inc. and subsidiaries (collectively, the “Company” or “PICO”) have been prepared in accordance with the interim reporting requirements of Form 10-Q, pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and notes required by generally accepted accounting principles in the United States of America (“U.S. GAAP”) for complete consolidated financial statements. In the opinion of management, all adjustments and reclassifications considered necessary for a fair and comparable presentation of the financial statements presented have been included and are of a normal recurring nature. Operating results presented are not necessarily indicative of the results that may be expected for the year ending December 31, 2019. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC. Smaller Reporting Company The Company qualifies as a smaller reporting company (“SRC”) under the SEC’s definition and therefore certain disclosures that are no longer required have been removed in accordance with the SEC’s disclosure requirements for SRCs. Use of Estimates in Preparation of Financial Statements The preparation of condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses for each reporting period. The significant estimates made in the preparation of the Company’s condensed consolidated financial statements relate to the assessment of impairment losses, intangible assets, tangible water assets and real estate, and deferred income taxes. It is reasonably possible that actual results could differ from the estimates upon which the carrying values were based. Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued guidance which establishes a right-of-use model that requires a lessee to record a right-of-use (“ROU”) asset and a lease liability on the balance sheet for all leases with terms longer than twelve months. Leases will be classified as either "finance" or "operating," with classification affecting the pattern of expense recognition in the income statement. This update requires a modified retrospective transition as of the beginning of the earliest comparative period presented in the financial statements. This update is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company adopted this lease standard effective January 1, 2019, applying an optional transition method that will allow the Company to continue to apply the current guidance of ASC 840 in the comparative periods in the year of adoption. The Company has elected the “package of practical expedients,” which permits the Company not to reassess prior conclusions about lease identification, lease classification and initial direct costs. The Company has also made an accounting policy election to not recognize ROU assets or lease liabilities for leases with terms of 12 months or less. The adoption of this guidance has resulted in the recording of additional ROU assets and lease liabilities for operating leases of $522,000 as of January 1, 2019. The adoption of this guidance did not have an impact on net income.

Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited, condensed consolidated financial statements of PICO Holdings, Inc. and subsidiaries (collectively, the “Company” or “PICO”) have been prepared in accordance with the interim reporting requirements of Form 10-Q, pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and notes required by generally accepted accounting principles in the United States of America (“U.S. GAAP”) for complete consolidated financial statements.

In the opinion of management, all adjustments and reclassifications considered necessary for a fair and comparable presentation of the financial statements presented have been included and are of a normal recurring nature. Operating results presented are not necessarily indicative of the results that may be expected for the year ending December 31, 2019.

These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC.

Smaller Reporting Company

The Company qualifies as a smaller reporting company (“SRC”) under the SEC’s definition and therefore certain disclosures that are no longer required have been removed in accordance with the SEC’s disclosure requirements for SRCs.

Use of Estimates in Preparation of Financial Statements

The preparation of condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses for each reporting period. The significant estimates made in the preparation of the Company’s condensed consolidated financial statements relate to the assessment of impairment losses, intangible assets, tangible water assets and real estate, and deferred income taxes. It is reasonably possible that actual results could differ from the estimates upon which the carrying values were based.

Recent Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board (“FASB”) issued guidance which establishes a right-of-use model that requires a lessee to record a right-of-use (“ROU”) asset and a lease liability on the balance sheet for all leases with terms longer than twelve months. Leases will be classified as either "finance" or "operating," with classification affecting the pattern of expense recognition in the income statement. This update requires a modified retrospective transition as of the beginning of the earliest comparative period presented in the financial statements. This update is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted.

The Company adopted this lease standard effective January 1, 2019, applying an optional transition method that will allow the Company to continue to apply the current guidance of ASC 840 in the comparative periods in the year of adoption. The Company has elected the “package of practical expedients,” which permits the Company not to reassess prior conclusions about lease identification, lease classification and initial direct costs. The Company has also made an accounting policy election to not recognize ROU assets or lease liabilities for leases with terms of 12 months or less. The adoption of this guidance has resulted in the recording of additional ROU assets and lease liabilities for operating leases of $522,000 as of January 1, 2019. The adoption of this guidance did not have an impact on net income.