Schedule II - Condensed Statements of Earnings (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME
Net investment income	$ 51,599	$ 40,286	$ 34,779	$ 30,990	$ 24,889	$ 25,706	$ 26,485	$ 24,326	$ 157,654	$ 101,406	$ 89,920
Total income	217,633	268,067	256,398	287,299	223,019	212,436	296,485	127,577	1,029,397	859,517	416,570
EXPENSES
Salaries and benefits	72,685	55,440	52,691	57,772	69,624	54,525	55,683	31,390	238,588	211,222	124,616
General and administrative expenses	36,020	44,895	41,272	38,826	40,804	41,039	37,177	22,250	161,013	141,270	86,612
Interest expense	5,368	5,156	4,876	4,003	2,352	3,307	3,529	3,734	19,403	12,922	12,389
Net foreign exchange losses (gains)	7,005	(841)	2,452	(5,071)	(1,476)	6,365	(525)	1,596	3,545	5,960	(4,369)
Total expenses	135,996	209,804	232,375	223,063	114,947	185,579	233,724	86,889	801,238	621,139	157,129
EARNINGS BEFORE INCOME TAXES	81,637	58,263	24,023	64,236	108,072	26,857	62,761	40,688	228,159	238,378	259,441
NET EARNINGS ATTRIBUTABLE TO ENSTAR GROUP LIMITED	$ 111,857	$ 49,042	$ 14,545	$ 44,847	$ 105,940	$ 26,429	$ 51,793	$ 29,587	220,291	213,749	208,604
Enstar Group Limited
INCOME
Net investment income									14,965	11,865	8,561
Dividend income from subsidiaries									1,000	21,952	27,118
Total income									15,965	33,817	35,679
EXPENSES
Salaries and benefits									0	128	117
General and administrative expenses									50,349	43,113	15,747
Interest expense									8,693	8,201	10,475
Net foreign exchange losses (gains)									213	379	(1,696)
Total expenses									59,255	51,821	24,643
EARNINGS BEFORE INCOME TAXES									(43,290)	(18,004)	11,036
EQUITY IN UNDISTRIBUTED EARNINGS OF SUBSIDIARIES									263,581	231,753	197,568
NET EARNINGS ATTRIBUTABLE TO ENSTAR GROUP LIMITED									$ 220,291	$ 213,749	$ 208,604