Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
NET EARNINGS (LOSS)	$ 928,219	$ (212,272)	$ 331,799
Other comprehensive income (loss), net of income taxes:
Unrealized holding gains (losses) on fixed income investments arising during the year	2,896	(2,284)	4,776
Reclassification adjustment for net realized gains (losses) included in net earnings	(3,894)	63	(491)
Unrealized gains (losses) arising during the year, net of reclassification adjustment	(998)	(2,221)	4,285
Change in currency translation adjustment	(2,428)	(202)	9,423
Reclassification to earnings on disposal of subsidiary	0	0	20,751
Total cumulative translation adjustment	(2,428)	(202)	30,174
Decrease in defined benefit pension liability	42	2,156	1,501
Total other comprehensive gain (loss)	(3,384)	(267)	35,960
Comprehensive income (loss)	924,835	(212,539)	367,759
Comprehensive loss (income) attributable to noncontrolling interest	9,985	62,291	(22,285)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSTAR GROUP LIMITED	$ 934,820	$ (150,248)	$ 345,474