Earnings Per Share - Comparison of Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic earnings per ordinary share:
Net earnings attributable to Enstar Group Limited	$ 45,520	$ 44,847
Weighted average ordinary shares outstanding - basic (shares)	19,282,946	19,237,461
Net earnings per ordinary share attributable to Enstar Group Limited - basic (dollars per share)	$ 2.36	$ 2.33
Diluted earnings per ordinary share:
Net earnings attributable to Enstar Group Limited	$ 45,520	$ 44,847
Weighted average ordinary shares outstanding - basic (shares)	19,282,946	19,237,461
Effect of dilutive securities:
Unvested shares (shares)	23,385	26,322
Restricted share unit (shares)	15,133	10,424
Warrants (shares)	87,430	60,430
Weighted average ordinary shares outstanding - diluted (shares)	19,408,894	19,334,637
Net earnings per ordinary share attributable to Enstar Group Limited - diluted (dollars per share)	$ 2.35	$ 2.32