Earnings Per Share - Comparison of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic earnings per ordinary share:
Net earnings attributable to Enstar Group Limited	$ 29,587	$ 11,959
Weighted average ordinary shares outstanding - basic	16,564,083	16,514,193
Net earnings per ordinary share attributable to Enstar Group Limited - basic	$ 1.79	$ 0.72
Diluted earnings per ordinary share:
Net earnings attributable to Enstar Group Limited	$ 29,587	$ 11,959
Weighted average ordinary shares outstanding - basic	16,564,083	16,514,193
Share equivalents:
Unvested shares	79,967	124,695
Restricted share units	20,475	16,514
Warrants	40,799	20,654
Weighted average ordinary shares outstanding - diluted	16,705,324	16,676,056
Net earnings per ordinary share attributable to Enstar Group Limited - diluted	$ 1.77	$ 0.72