Schedule of Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands		Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Total investments		$ 1,536,854		$ 1,410,655
Cash and cash equivalents		78,181		99,497	$ 40,646		$ 74,414
Investments in subsidiaries		0		0
Due from subsidiaries and affiliates		0		0
Notes receivable – affiliate		0		0
Interest receivable – affiliate		0		0
Premiums receivable, net		112,992		87,679
Reinsurance receivables, net		83,012		114,418
Funds held by ceding insurers		48,751		49,206
Federal income taxes receivable		11,136		10,866
Deferred federal income taxes		36,479		48,589
Deferred acquisition costs		70,861		61,676
Intangible assets		21,623		22,020
Goodwill		6,521		6,521
Prepaid reinsurance premiums		17,763		20,594
Receivable for securities sold		0		15
Other assets		59,983		28,530
Total assets		2,084,156		1,960,266	1,958,046
Liabilities:
Unpaid losses and loss adjustment expenses		633,287	$ 608,773	680,031	608,607	$ 613,670	634,664
Unearned premiums		316,797		281,912
Ceded balances payable		36,431		14,994
Payable for securities purchased		848		0
Contingent commissions		10,035		10,636
Debt		297,324		288,565
Notes payable – affiliates		0		0
Accrued interest payable – affiliates		0		0
Other liabilities		82,050		55,069
Total liabilities		1,376,772		1,331,207
Shareholders’ equity
Total shareholders’ equity		707,384		629,059	702,326
Total liabilities and shareholders’ equity		2,084,156		1,960,266
Global Indemnity Limited (Parent co-obligor) | Reportable Legal Entities
ASSETS
Total investments		47,732		55,377
Cash and cash equivalents		3,604		2,221	102		11,089
Investments in subsidiaries		1,195,308		1,105,032
Due from subsidiaries and affiliates		314		584
Notes receivable – affiliate		0		0
Interest receivable – affiliate		0		0
Premiums receivable, net		0		0
Reinsurance receivables, net		0		0
Funds held by ceding insurers		0		0
Federal income taxes receivable		0		0
Deferred federal income taxes		0		0
Deferred acquisition costs		0		0
Intangible assets		0		0
Goodwill		0		0
Prepaid reinsurance premiums		0		0
Receivable for securities sold		0		0
Other assets		7,013		8,461
Total assets		1,253,971		1,171,675
Liabilities:
Unpaid losses and loss adjustment expenses		0		0
Unearned premiums		0		0
Ceded balances payable		0		0
Payable for securities purchased		0
Contingent commissions		0		0
Debt		0		0
Notes payable – affiliates		520,498		520,498
Accrued interest payable – affiliates		20,131		19,499
Other liabilities		5,958		2,619
Total liabilities		546,587		542,616
Shareholders’ equity
Total shareholders’ equity		707,384		629,059
Total liabilities and shareholders’ equity		1,253,971		1,171,675
Global Indemnity Group, Inc.(Subsidiary co-obligor) | Reportable Legal Entities
ASSETS
Total investments		255,817		233,479
Cash and cash equivalents		22,966		26,039	1,904		7,749
Investments in subsidiaries		335,425		296,357
Due from subsidiaries and affiliates		(24,170)		(2,133)
Notes receivable – affiliate		80,049		80,049
Interest receivable – affiliate		4,731		3,869
Premiums receivable, net		0		0
Reinsurance receivables, net		0		0
Funds held by ceding insurers		0		0
Federal income taxes receivable		12,461		4,631
Deferred federal income taxes		38,847		44,481
Deferred acquisition costs		0		0
Intangible assets		0		0
Goodwill		0		0
Prepaid reinsurance premiums		0		0
Receivable for securities sold		59		0
Other assets		14,770		5,085
Total assets		740,955		691,857
Liabilities:
Unpaid losses and loss adjustment expenses		0		0
Unearned premiums		0		0
Ceded balances payable		0		0
Payable for securities purchased		0
Contingent commissions		0		0
Debt		304,379		295,818
Notes payable – affiliates		402,310		402,310
Accrued interest payable – affiliates		0		0
Other liabilities		19,002		13,651
Total liabilities		725,691		711,779
Shareholders’ equity
Total shareholders’ equity		15,264		(19,922)
Total liabilities and shareholders’ equity		740,955		691,857
Other Global Indemnity Limited Subsidiaries and Eliminations (non-co-obligor subsidiaries)
ASSETS
Total investments	[1]	1,233,305		1,121,799
Cash and cash equivalents	[1]	51,611		71,237	$ 38,640		$ 55,576
Investments in subsidiaries	[1]	15,264		(19,922)
Due from subsidiaries and affiliates	[1]	23,856		1,549
Notes receivable – affiliate	[1]	847,808		847,808
Interest receivable – affiliate	[1]	17,258		17,425
Premiums receivable, net	[1]	112,992		87,679
Reinsurance receivables, net	[1]	83,012		114,418
Funds held by ceding insurers	[1]	48,751		49,206
Federal income taxes receivable	[1]	(1,325)		6,235
Deferred federal income taxes	[1]	(2,368)		4,108
Deferred acquisition costs	[1]	70,861		61,676
Intangible assets	[1]	21,623		22,020
Goodwill	[1]	6,521		6,521
Prepaid reinsurance premiums	[1]	17,763		20,594
Receivable for securities sold	[1]	(59)		15
Other assets	[1]	45,255		22,237
Total assets	[1]	2,592,128		2,434,605
Liabilities:
Unpaid losses and loss adjustment expenses	[1]	633,287		680,031
Unearned premiums	[1]	316,797		281,912
Ceded balances payable	[1]	36,431		14,994
Payable for securities purchased	[1]	848
Contingent commissions	[1]	10,035		10,636
Debt	[1]	0		0
Notes payable – affiliates	[1]	5,049		5,049
Accrued interest payable – affiliates	[1]	1,858		1,795
Other liabilities	[1]	57,090		38,799
Total liabilities	[1]	1,061,395		1,033,216
Shareholders’ equity
Total shareholders’ equity	[1]	1,530,733		1,401,389
Total liabilities and shareholders’ equity	[1]	2,592,128		2,434,605
Consolidation Adjustments
ASSETS
Total investments	[2]	0		0
Cash and cash equivalents	[2]	0		0
Investments in subsidiaries	[2]	(1,545,997)		(1,381,467)
Due from subsidiaries and affiliates	[2]	0		0
Notes receivable – affiliate	[2]	(927,857)		(927,857)
Interest receivable – affiliate	[2]	(21,989)		(21,294)
Premiums receivable, net	[2]	0		0
Reinsurance receivables, net	[2]	0		0
Funds held by ceding insurers	[2]	0		0
Federal income taxes receivable	[2]	0		0
Deferred federal income taxes	[2]	0		0
Deferred acquisition costs	[2]	0		0
Intangible assets	[2]	0		0
Goodwill	[2]	0		0
Prepaid reinsurance premiums	[2]	0		0
Receivable for securities sold	[2]	0		0
Other assets	[2]	(7,055)		(7,253)
Total assets	[2]	(2,502,898)		(2,337,871)
Liabilities:
Unpaid losses and loss adjustment expenses	[2]	0		0
Unearned premiums	[2]	0		0
Ceded balances payable	[2]	0		0
Payable for securities purchased	[2]	0
Contingent commissions	[2]	0		0
Debt	[2]	(7,055)		(7,253)
Notes payable – affiliates	[2]	(927,857)		(927,857)
Accrued interest payable – affiliates	[2]	(21,989)		(21,294)
Other liabilities	[2]	0		0
Total liabilities	[2]	(956,901)		(956,404)
Shareholders’ equity
Total shareholders’ equity	[2]	(1,545,997)		(1,381,467)
Total liabilities and shareholders’ equity	[2]	$ (2,502,898)		$ (2,337,871)

[1] Includes all other subsidiaries of Global Indemnity Limited and eliminations

[2] Includes Parent co-obligor and subsidiary co-obligor consolidating adjustments