Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Thousands, except Share data	Common Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss), Net Of Deferred Income Taxes [Member]	Retained Earnings [Member]	Treasury Shares At Cost [Member]	Total
Balance, beginning of period at Dec. 31, 2012	$ 671	$ 1,946,439	$ 537,049	$ 5,613,266	$ (1,363,958)
Balance, beginning of period, shares at Dec. 31, 2012	51,417,962
Issued during the period, shares	498,157
Treasury shares acquired, shares	(1,950,307)
Issued during the period, net	5
Share-based compensation plans		32,527
Net increase (decrease) during the period			(70,613)			(70,613)
Net income (loss) attributable to Everest Re Group				384,343		384,343
Dividends declared ($0.75 per share in 2014 and $0.48 per share in 2013)				(24,231)		(24,231)
Purchase of treasury shares					(238,632)
Balance, end of period at Mar. 31, 2013	676	1,978,966	466,436	5,973,378	(1,602,590)	6,816,866
Balance, end of period, shares at Mar. 31, 2013	49,965,812
Balance, beginning of period at Dec. 31, 2013	680	2,029,774	157,728	6,765,967	(1,985,873)	6,968,276
Balance, beginning of period, shares at Dec. 31, 2013	47,543,132					67,965,000
Issued during the period, shares	206,071
Treasury shares acquired, shares	(1,692,164)
Issued during the period, net	2
Share-based compensation plans		6,546
Net increase (decrease) during the period			53,479			53,479
Net income (loss) attributable to Everest Re Group				293,933		293,933
Dividends declared ($0.75 per share in 2014 and $0.48 per share in 2013)				(34,742)		(34,742)
Purchase of treasury shares					(249,983)
Balance, end of period at Mar. 31, 2014	$ 682	$ 2,036,320	$ 211,207	$ 7,025,158	$ (2,235,856)	$ 7,037,511
Balance, end of period, shares at Mar. 31, 2014	46,057,039					68,171,000