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Note 7 - Underwriting Information - Schedule of Gross Written Premiums (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 597,171 | $ 414,977 | $ 1,535,623 | $ 1,168,239
Percentage of Gross Written Premiums | 100.00% | 100.00% | 100.00% | 100.00%
Palomar Specialty Insurance Company [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 317,177 | $ 236,624 | $ 781,078 | $ 652,988
Percentage of Gross Written Premiums | 53.10% | 57.00% | 50.90% | 55.90%
Palomar Excess And Surplus Insurance Company [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 252,318 | $ 159,305 | $ 681,048 | $ 472,909
Percentage of Gross Written Premiums | 42.30% | 38.40% | 44.40% | 40.50%
Laulima Insurance Company [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 22,804 | $ 19,048 | $ 58,974 | $ 42,342
Percentage of Gross Written Premiums | 3.80% | 4.60% | 3.80% | 3.60%
First Indemnity of America Insurance Company [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 4,872 | $ 0 | $ 14,523 | $ 0
Percentage of Gross Written Premiums | 0.80% | 0.00% | 0.90% | 0.00%
CALIFORNIA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 168,739 | $ 170,265 | $ 472,276 | $ 510,879
Percentage of Gross Written Premiums | 28.30% | 41.00% | 30.80% | 43.70%
TEXAS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 38,609 | $ 27,019 | $ 119,308 | $ 96,414
Percentage of Gross Written Premiums | 6.50% | 6.50% | 7.80% | 8.30%
HAWAII |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 26,405 | $ 23,171 | $ 71,307 | $ 53,922
Percentage of Gross Written Premiums | 4.40% | 5.60% | 4.60% | 4.60%
FLORIDA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 23,770 | $ 14,433 | $ 66,391 | $ 58,153
Percentage of Gross Written Premiums | 4.00% | 3.50% | 4.30% | 5.00%
ILLINOIS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 20,911 | $ 5,557 | $ 39,548 | $ 13,725
Percentage of Gross Written Premiums | 3.50% | 1.30% | 2.60% | 1.20%
NORTH DAKOTA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 20,022 | $ 18,716 | $ 23,709 | $ 19,893
Percentage of Gross Written Premiums | 3.40% | 4.50% | 1.50% | 1.70%
NEW YORK |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 19,181 | $ 8,153 | $ 51,240 | $ 24,163
Percentage of Gross Written Premiums | 3.20% | 2.00% | 3.30% | 2.10%
WASHINGTON |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 17,560 | $ 16,828 | $ 50,416 | $ 41,893
Percentage of Gross Written Premiums | 2.90% | 4.10% | 3.30% | 3.60%
Other States [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 261,974 | $ 130,835 | $ 641,428 | $ 349,197
Percentage of Gross Written Premiums | 43.80% | 31.50% | 41.80% | 29.80%
Casualty [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 152,034 | $ 56,307 | $ 392,473 | $ 166,762
Percentage of Gross Written Premiums | 25.50% | 13.60% | 25.60% | 14.30%
Earthquake Premiums [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 149,940 | $ 135,329 | $ 427,869 | $ 376,088
Percentage of Gross Written Premiums | 25.10% | 32.60% | 27.90% | 32.20%
Crop [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 119,757 | $ 59,662 | $ 207,440 | $ 100,571
Percentage of Gross Written Premiums | 20.10% | 14.40% | 13.50% | 8.60%
Inland Marine and Other Property [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 117,871 | $ 78,734 | $ 335,462 | $ 249,147
Percentage of Gross Written Premiums | 19.70% | 19.00% | 21.80% | 21.30%
Fronting Premium [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross written premiums | $ 57,569 | $ 84,945 | $ 172,379 | $ 275,671
Percentage of Gross Written Premiums | 9.60% | 20.40% | 11.20% | 23.60%

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