XML 38 R28.htm IDEA: XBRL DOCUMENT
v3.23.3

Investments (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of Amortized Cost and Estimated Fair Value of Company's Fixed Maturities Securities | The amortized cost and estimated fair value of the Company’s fixed maturities securities were as follows as of September 30, 2023 and December 31, 2022:
(Dollars in thousands) |  | Amortized Cost |  |  | Allowance for Expected Credit Losses |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
As of September 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 451,829 |  |  | $ | — |  |  | $ | 13 |  |  | $ | (6,671 | ) |  | $ | 445,171 |
Obligations of states and political subdivisions |  |  | 27,975 |  |  |  | — |  |  |  | — |  |  |  | (1,760 | ) |  |  | 26,215 |
Mortgage-backed securities |  |  | 66,571 |  |  |  | — |  |  |  | 18 |  |  |  | (7,487 | ) |  |  | 59,102 |
Asset-backed securities |  |  | 208,011 |  |  |  | — |  |  |  | 87 |  |  |  | (7,124 | ) |  |  | 200,974 |
Commercial mortgage-backed securities |  |  | 85,375 |  |  |  | — |  |  |  | 13 |  |  |  | (6,628 | ) |  |  | 78,760 |
Corporate bonds |  |  | 331,758 |  |  |  | — |  |  |  | 80 |  |  |  | (11,351 | ) |  |  | 320,487 |
Foreign corporate bonds |  |  | 162,611 |  |  |  | — |  |  |  | 11 |  |  |  | (6,236 | ) |  |  | 156,386 |
Total fixed maturities |  | $ | 1,334,130 |  |  | $ | — |  |  | $ | 222 |  |  | $ | (47,257 | ) |  | $ | 1,287,095 |
(Dollars in thousands) |  | Amortized Cost |  |  | Allowance for Expected Credit Losses |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
As of December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 352,533 |  |  | $ | — |  |  | $ | — |  |  | $ | (8,430 | ) |  | $ | 344,103 |
Obligations of states and political subdivisions |  |  | 33,471 |  |  |  | — |  |  |  | — |  |  |  | (1,876 | ) |  |  | 31,595 |
Mortgage-backed securities |  |  | 67,560 |  |  |  | — |  |  |  | 165 |  |  |  | (5,609 | ) |  |  | 62,116 |
Asset-backed securities |  |  | 198,161 |  |  |  | — |  |  |  | 390 |  |  |  | (9,151 | ) |  |  | 189,400 |
Commercial mortgage-backed securities |  |  | 104,777 |  |  |  | — |  |  |  | 20 |  |  |  | (6,133 | ) |  |  | 98,664 |
Corporate bonds |  |  | 353,622 |  |  |  | — |  |  |  | 16 |  |  |  | (14,858 | ) |  |  | 338,780 |
Foreign corporate bonds |  |  | 191,599 |  |  |  | — |  |  |  | — |  |  |  | (8,059 | ) |  |  | 183,540 |
Total fixed maturities |  | $ | 1,301,723 |  |  | $ | — |  |  | $ | 591 |  |  | $ | (54,116 | ) |  | $ | 1,248,198 |
Schedule Of Investments In Equity Securities | As of September 30, 2023 and December 31, 2022, the Company’s investments in equity securities consist of the following:
(Dollars in thousands) |  | September 30, 2023 |  |  | December 31, 2022 |
Common stock |  | $ | 1,189 |  |  | $ | 1,271 |
Preferred stock |  |  | 15,765 |  |  |  | 16,249 |
Total |  | $ | 16,954 |  |  | $ | 17,520 |
Summary of Amortized Cost and Estimated Fair Value Through Fixed Maturities | The amortized cost and estimated fair value of the Company’s fixed maturities portfolio classified as available for sale at September 30, 2023, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
(Dollars in thousands) |  | Amortized Cost |  |  | Estimated Fair Value |
Due in one year or less |  | $ | 652,549 |  |  | $ | 645,791 |
Due in one year through five years |  |  | 294,500 |  |  |  | 279,512 |
Due in five years through ten years |  |  | 15,533 |  |  |  | 13,157 |
Due after ten years |  |  | 11,591 |  |  |  | 9,799 |
Mortgage-backed securities |  |  | 66,571 |  |  |  | 59,102 |
Asset-backed securities |  |  | 208,011 |  |  |  | 200,974 |
Commercial mortgage-backed securities |  |  | 85,375 |  |  |  | 78,760 |
Total |  | $ | 1,334,130 |  |  | $ | 1,287,095 |
Summary of Securities With Gross Unrealized Losses | The following table contains an analysis of the Company’s fixed income securities with gross unrealized losses that are not deemed to have credit losses, categorized by the period that the securities were in a continuous loss position as of September 30, 2023. The fair value amounts reported in the table are estimates that are prepared using the process described in Note 6.
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
(Dollars in thousands) |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
Fixed maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 97,951 |  |  | $ | (1,146 | ) |  | $ | 252,138 |  |  | $ | (5,525 | ) |  | $ | 350,089 |  |  | $ | (6,671 | )
Obligations of states and political subdivisions |  |  | — |  |  |  | — |  |  |  | 26,215 |  |  |  | (1,760 | ) |  |  | 26,215 |  |  |  | (1,760 | )
Mortgage-backed securities |  |  | 22,425 |  |  |  | (1,738 | ) |  |  | 35,093 |  |  |  | (5,749 | ) |  |  | 57,518 |  |  |  | (7,487 | )
Asset-backed securities |  |  | 66,818 |  |  |  | (1,024 | ) |  |  | 115,001 |  |  |  | (6,100 | ) |  |  | 181,819 |  |  |  | (7,124 | )
Commercial mortgage-backed securities |  |  | 2,203 |  |  |  | (105 | ) |  |  | 76,236 |  |  |  | (6,523 | ) |  |  | 78,439 |  |  |  | (6,628 | )
Corporate bonds |  |  | 57,729 |  |  |  | (566 | ) |  |  | 241,105 |  |  |  | (10,785 | ) |  |  | 298,834 |  |  |  | (11,351 | )
Foreign corporate bonds |  |  | 27,112 |  |  |  | (104 | ) |  |  | 115,392 |  |  |  | (6,132 | ) |  |  | 142,504 |  |  |  | (6,236 | )
Total fixed maturities |  | $ | 274,238 |  |  | $ | (4,683 | ) |  | $ | 861,180 |  |  | $ | (42,574 | ) |  | $ | 1,135,418 |  |  | $ | (47,257 | )
The following table contains an analysis of the Company’s fixed income securities with gross unrealized losses that are not deemed to have credit losses, categorized by the period that the securities were in a continuous loss position as of December 31, 2022. The fair value amounts reported in the table are estimates that are prepared using the process described in Note 6.
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
(Dollars in thousands) |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |
Fixed maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 335,781 |  |  | $ | (7,518 | ) |  | $ | 8,322 |  |  | $ | (912 | ) |  | $ | 344,103 |  |  | $ | (8,430 | )
Obligations of states and political subdivisions |  |  | 27,772 |  |  |  | (1,378 | ) |  |  | 3,778 |  |  |  | (498 | ) |  |  | 31,550 |  |  |  | (1,876 | )
Mortgage-backed securities |  |  | 51,517 |  |  |  | (4,228 | ) |  |  | 7,860 |  |  |  | (1,381 | ) |  |  | 59,377 |  |  |  | (5,609 | )
Asset-backed securities |  |  | 97,857 |  |  |  | (3,610 | ) |  |  | 62,689 |  |  |  | (5,541 | ) |  |  | 160,546 |  |  |  | (9,151 | )
Commercial mortgage-backed securities |  |  | 67,926 |  |  |  | (4,072 | ) |  |  | 27,907 |  |  |  | (2,061 | ) |  |  | 95,833 |  |  |  | (6,133 | )
Corporate bonds |  |  | 261,123 |  |  |  | (8,480 | ) |  |  | 71,192 |  |  |  | (6,378 | ) |  |  | 332,315 |  |  |  | (14,858 | )
Foreign corporate bonds |  |  | 150,308 |  |  |  | (5,469 | ) |  |  | 31,232 |  |  |  | (2,590 | ) |  |  | 181,540 |  |  |  | (8,059 | )
Total fixed maturities |  | $ | 992,284 |  |  | $ | (34,755 | ) |  | $ | 212,980 |  |  | $ | (19,361 | ) |  | $ | 1,205,264 |  |  | $ | (54,116 | )
Schedule of Impairments on Investments | The Company recorded the following impairments on its investment portfolio for the quarters and nine months ended September 30, 2023 and 2022 and are related to securities in an unrealized loss position where the Company had an intent to sell the securities:
|  | Quarters Ended September 30, |  |  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 (1) |
Fixed maturities: |  |  |  |  |  |  |  |  |  |  |  |
Impairment related to intent to sell |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (26,205 | )
Total |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (26,205 | )
(1) In response to a rising interest rate environment, the Company took action early in April 2022 to shorten the duration of its fixed maturities portfolio. In connection with these actions, the Company identified fixed maturities securities with a weighted average life of five years or greater as having an intent to sell resulting in other-than-temporary impairment losses. The majority of which were sold in the 2nd quarter of 2022. Most of the proceeds from the sale of these securities were reinvested into fixed income investments with maturities of two years. As a result of these actions, the Company's book yield rose over time. Book yield was approximately 2.2% at December 31, 2021 and 4.0% at September 30, 2023.
Schedule of Accumulated Other Comprehensive Income, Net of Tax | Accumulated other comprehensive income (loss), net of tax, as of September 30, 2023 and December 31, 2022 was as follows:
(Dollars in thousands) |  | September 30, 2023 |  |  | December 31, 2022 |
Net unrealized gains (losses) from: |  |  |  |  |  |
Fixed maturities |  | $ | (47,035 | ) |  | $ | (53,525 | )
Foreign currency fluctuations |  |  | (509 | ) |  |  | (127 | )
Deferred taxes |  |  | 9,427 |  |  |  | 10,594 |
Accumulated other comprehensive income (loss), net of tax |  | $ | (38,117 | ) |  | $ | (43,058 | )
Changes in Accumulated Other Comprehensive Income | The following tables present the changes in accumulated other comprehensive income (loss), net of tax, by components, for the quarters and nine months ended September 30, 2023 and 2022:
Quarter Ended September 30, 2023 (Dollars in thousands) |  | Unrealized Gains and Losses on Available for Sale Securities |  |  | Foreign Currency Items |  |  | Accumulated Other Comprehensive Income (Loss) |
Beginning balance, net of tax |  | $ | (36,912 | ) |  | $ | (259 | ) |  | $ | (37,171 | )
Other comprehensive loss before reclassification, before tax |  |  | (1,192 | ) |  |  | (181 | ) |  |  | (1,373 | )
Amounts reclassified from accumulated other comprehensive income, before tax |  |  | 118 |  |  |  | — |  |  |  | 118 |
Other comprehensive loss, before tax |  |  | (1,074 | ) |  |  | (181 | ) |  |  | (1,255 | )
Income tax benefit |  |  | 271 |  |  |  | 38 |  |  |  | 309 |
Ending balance, net of tax |  | $ | (37,715 | ) |  | $ | (402 | ) |  | $ | (38,117 | )
Quarter Ended September 30, 2022 (Dollars in thousands) |  | Unrealized Gains and Losses on Available for Sale Securities |  |  | Foreign Currency Items |  |  | Accumulated Other Comprehensive Income (Loss) |
Beginning balance, net of tax |  | $ | (26,395 | ) |  | $ | (230 | ) |  | $ | (26,625 | )
Other comprehensive loss before reclassification, before tax |  |  | (23,133 | ) |  |  | (163 | ) |  |  | (23,296 | )
Amounts reclassified from accumulated other comprehensive income, before tax |  |  | 259 |  |  |  | — |  |  |  | 259 |
Other comprehensive loss, before tax |  |  | (22,874 | ) |  |  | (163 | ) |  |  | (23,037 | )
Income tax benefit |  |  | 4,291 |  |  |  | 34 |  |  |  | 4,325 |
Ending balance, net of tax |  | $ | (44,978 | ) |  | $ | (359 | ) |  | $ | (45,337 | )
Nine Months Ended September 30, 2023 (Dollars in thousands) |  | Unrealized Gains and Losses on Available for Sale Securities |  |  | Foreign Currency Items |  |  | Accumulated Other Comprehensive Income (Loss) |
Beginning balance, net of tax |  | $ | (42,958 | ) |  | $ | (100 | ) |  | $ | (43,058 | )
Other comprehensive (loss) before reclassification, before tax |  |  | 5,179 |  |  |  | (382 | ) |  |  | 4,797 |
Amounts reclassified from accumulated other comprehensive income, before tax |  |  | 1,311 |  |  |  | — |  |  |  | 1,311 |
Other comprehensive income (loss), before tax |  |  | 6,490 |  |  |  | (382 | ) |  |  | 6,108 |
Income tax (expense) benefit |  |  | (1,247 | ) |  |  | 80 |  |  |  | (1,167 | )
Ending balance, net of tax |  | $ | (37,715 | ) |  | $ | (402 | ) |  | $ | (38,117 | )
Nine Months Ended September 30, 2022 (Dollars in thousands) |  | Unrealized Gains and Losses on Available for Sale Securities |  |  | Foreign Currency Items |  |  | Accumulated Other Comprehensive Income (Loss) |
Beginning balance, net of tax |  | $ | 6,519 |  |  | $ | (115 | ) |  | $ | 6,404 |
Other comprehensive loss before reclassification, before tax |  |  | (102,400 | ) |  |  | (309 | ) |  |  | (102,709 | )
Amounts reclassified from accumulated other comprehensive income, before tax |  |  | 38,340 |  |  |  | — |  |  |  | 38,340 |
Other comprehensive loss, before tax |  |  | (64,060 | ) |  |  | (309 | ) |  |  | (64,369 | )
Income tax benefit |  |  | 12,563 |  |  |  | 65 |  |  |  | 12,628 |
Ending balance, net of tax |  | $ | (44,978 | ) |  | $ | (359 | ) |  | $ | (45,337 | )
Reclassifications Out of Accumulated Other Comprehensive Income | The reclassifications out of accumulated other comprehensive income (loss) for the quarters and nine months ended September 30, 2023 and 2022 were as follows:
|  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income |
(Dollars in thousands) |  |  |  | Quarters Ended September 30, |
Details about Accumulated Other Comprehensive Income Components |  | Affected Line Item in the Consolidated Statements of Operations |  | 2023 |  |  | 2022 |
Unrealized gains and losses on available for sale securities |  | Other net realized investment (gains) losses |  | $ | 118 |  |  | $ | 259 |
|  | Other than temporary impairment losses on investments |  |  | — |  |  |  | — |
|  | Total before tax |  | $ | 118 |  |  | $ | 259 |
|  | Income tax expense (benefit) |  |  | (24 | ) |  |  | (65 | )
|  | Total reclassifications, net of tax |  | $ | 94 |  |  | $ | 194 |
|  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income |
(Dollars in thousands) |  |  |  | Nine Months Ended September 30, |
Details about Accumulated Other Comprehensive Income Components |  | Affected Line Item in the Consolidated Statements of Operations |  | 2023 |  |  | 2022 |
Unrealized gains and losses on available for sale securities |  | Other net realized investment (gains) losses |  | $ | 1,311 |  |  | $ | 12,135 |
|  | Other than temporary impairment losses on investments |  |  | — |  |  |  | 26,205 |
|  | Total before tax |  | $ | 1,311 |  |  | $ | 38,340 |
|  | Income tax expense (benefit) |  |  | (251 | ) |  |  | (7,184 | )
|  | Total reclassifications, net of tax |  | $ | 1,060 |  |  | $ | 31,156 |
Components of Net Realized Investment Gains (Losses) | The components of net realized investment gains (losses) for the quarters and nine months ended September 30, 2023 and 2022 were as follows:
|  | Quarters Ended September 30, |  |  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Fixed maturities: |  |  |  |  |  |  |  |  |  |  |  |
Gross realized gains |  | $ | 15 |  |  | $ | 226 |  |  | $ | 29 |  |  | $ | 512 |
Gross realized losses |  |  | (133 | ) |  |  | (485 | ) |  |  | (1,340 | ) |  |  | (38,852 | )
Net realized gains (losses) |  |  | (118 | ) |  |  | (259 | ) |  |  | (1,311 | ) |  |  | (38,340 | )
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |
Gross realized gains |  |  | 163 |  |  |  | 159 |  |  |  | 726 |  |  |  | 1,803 |
Gross realized losses |  |  | (178 | ) |  |  | (219 | ) |  |  | (1,829 | ) |  |  | (5,623 | )
Net realized gains (losses) |  |  | (15 | ) |  |  | (60 | ) |  |  | (1,103 | ) |  |  | (3,820 | )
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |
Gross realized gains |  |  | — |  |  |  | 2,906 |  |  |  | — |  |  |  | 11,867 |
Gross realized losses |  |  | — |  |  |  | (353 | ) |  |  | — |  |  |  | (2,774 | )
Net realized gains (losses) (1) |  |  | — |  |  |  | 2,553 |  |  |  | — |  |  |  | 9,093 |
Total net realized investment gains (losses) |  | $ | (133 | ) |  | $ | 2,234 |  |  | $ | (2,414 | ) |  | $ | (33,067 | )
(1) Includes periodic net interest settlements related to the derivatives of $0.5 million for the quarters ended September 30, 2022 and $3.0 million for the nine months ended September 30, 2022.
Summary of Calculation of Realized Gains and Losses | The following table shows the calculation of the portion of realized gains and losses related to equity securities held as of September 30, 2023 and 2022:
|  | Quarters Ended September 30, |  |  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Net gains (losses) recognized during the period on equity securities |  | $ | (15 | ) |  | $ | (60 | ) |  | $ | (1,103 | ) |  | $ | (3,820 | )
Less: net gains (losses) recognized during the period on equity securities sold during the period |  |  | 15 |  |  |  | — |  |  |  | 32 |  |  |  | 10,616 |
Unrealized gains (losses) recognized during the reporting period on equity securities |  | $ | (30 | ) |  | $ | (60 | ) |  | $ | (1,135 | ) |  | $ | (14,436 | )
Proceeds from Sales and Redemptions of Available-for-Sale Securities | The proceeds from sales and redemptions of available for sale and equity securities resulting in net realized inv estment gains (losses) for the nine months ended September 30, 2023 and 2022 were as follows:
|  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2023 |  |  | 2022 |
Fixed maturities |  | $ | 114,058 |  |  | $ | 866,458 |
Equity securities |  |  | 24 |  |  |  | 88,726 |
Schedule of Investment Income | The sources of net investment income for the quarters and nine months ended September 30, 2023 and 2022 were as follows:
|  | Quarters Ended September 30, |  |  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Fixed maturities |  | $ | 12,961 |  |  | $ | 9,595 |  |  | $ | 36,734 |  |  | $ | 23,466 |
Equity securities |  |  | 188 |  |  |  | 233 |  |  |  | 635 |  |  |  | 842 |
Cash and cash equivalents |  |  | 501 |  |  |  | 89 |  |  |  | 1,064 |  |  |  | 220 |
Other invested assets |  |  | 916 |  |  |  | (1,061 | ) |  |  | 2,080 |  |  |  | (5,935 | )
Total investment income |  |  | 14,566 |  |  |  | 8,856 |  |  |  | 40,513 |  |  |  | 18,593 |
Investment expense |  |  | (366 | ) |  |  | (467 | ) |  |  | (1,089 | ) |  |  | (1,682 | )
Net investment income |  | $ | 14,200 |  |  | $ | 8,389 |  |  | $ | 39,424 |  |  | $ | 16,911 |
Schedule of Total Investment Return | The Company’s total investment return on a pre-tax basis for the quarters and nine months ended September 30, 2023 and 2022 were as follows:
|  | Quarters Ended September 30, |  |  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Net investment income |  | $ | 14,200 |  |  | $ | 8,389 |  |  | $ | 39,424 |  |  | $ | 16,911 |
Net realized investment losses |  |  | (133 | ) |  |  | 2,234 |  |  |  | (2,414 | ) |  |  | (33,067 | )
Change in unrealized holding gains (losses) |  |  | (1,254 | ) |  |  | (23,037 | ) |  |  | 6,108 |  |  |  | (64,369 | )
Net realized and unrealized investment returns |  |  | (1,387 | ) |  |  | (20,803 | ) |  |  | 3,694 |  |  |  | (97,436 | )
Total investment return |  | $ | 12,813 |  |  | $ | (12,414 | ) |  | $ | 43,118 |  |  | $ | (80,525 | )
Total investment return % (1) |  |  | 0.9 | % |  |  | (0.9 | %) |  |  | 3.2 | % |  |  | (5.6 | %)
Average investment portfolio (2) |  | $ | 1,355,077 |  |  | $ | 1,341,285 |  |  | $ | 1,354,727 |  |  | $ | 1,444,037 |
(1) Not annualized. (2) Average of total cash and invested assets, net of receivable/payable for securities purchased and sold, as of the beginning and end of the period.
Summary of Estimated Fair Values of Bonds Held on Deposit | The fair values were as follows as of September 30, 2023 and December 31, 2022:
|  | Estimated Fair Value |
(Dollars in thousands) |  | September 30, 2023 |  |  | December 31, 2022 |
On deposit with governmental authorities |  | $ | 18,721 |  |  | $ | 19,290 |
Held in trust pursuant to third party requirements |  |  | 166,025 |  |  |  | 161,901 |
Total (1) |  | $ | 184,746 |  |  | $ | 181,191 |
(1) Includes cash and cash equivalents of $10.4 million and $3.7 million at September 30, 2023 and December 31, 2022, respectively, with the remainder related to bonds available for sale.

X
- Definition Proceeds From Sales Of Available For Sale Securities + References No definition available. + Details
Name: | gbli_ProceedsFromSalesOfAvailableForSaleSecuritiesTableTextBlock
Namespace Prefix: | gbli_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of changes in accumulated other comprehensive income. + References No definition available. + Details
Name: | gbli_ScheduleOfChangesInAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | gbli_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Investment Return On After Tax Basis + References No definition available. + Details
Name: | gbli_ScheduleOfInvestmentReturnOnAfterTaxBasisTableTextBlock
Namespace Prefix: | gbli_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of investments in equity securities. + References No definition available. + Details
Name: | gbli_ScheduleOfInvestmentsInEquitySecuritiesTableTextBlock
Namespace Prefix: | gbli_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Other Than Temporary Impairment Losses Investments Available For Sale Securities Table + References No definition available. + Details
Name: | gbli_ScheduleOfOtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesTableTextBlock
Namespace Prefix: | gbli_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Estimated Fair Values Of Bonds Available For Sale, Held On Deposit And In Trust + References No definition available. + Details
Name: | gbli_SummaryOfEstimatedFairValuesOfBondsAvailableForSaleHeldOnDepositAndInTrustTableTextBlock
Namespace Prefix: | gbli_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment income, including, but not limited to, interest and dividend income and amortization of discount (premium) derived from debt and equity securities. Excludes realized and unrealized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(a),(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_InvestmentIncomeTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of realized gains and losses on investments reported in the statement of income. + References No definition available. + Details
Name: | us-gaap_RealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-20 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
Name: | us-gaap_ScheduleOfRealizedGainLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration