Earnings Per Common Share (Schedule Of Net Income (Loss) Per Common Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Common Share [Abstract]
Net income (loss) attributable to Everest Re Group	$ 293,933		$ 384,343
Less: dividends declared-common shares and nonvested common shares	(34,742)		(24,231)
Undistributed earnings	259,191		360,112
Percentage allocated to common shareholders	99.00%	[1]	99.20%	[1]
Net income (loss) available to common stockholders, total	256,717		357,222
Add: dividends declared-common shareholders	34,391		24,019
Numerator for basic and diluted earnings per common share	$ 291,108		$ 381,241
Denominator for basic earnings per weighted-average common shares	46,479		50,423
Effect of dilutive securities: Options	434		399
Denominator for diluted earnings per adjusted weighted-average common shares	46,913		50,822
Basic	$ 6.26		$ 7.56
Diluted	$ 6.21		$ 7.50
Basic weighted-average common shares outstanding	46,479		50,423
Basic weighted-average common shares outstanding and nonvested common shares expected to vest	46,927		50,831

[1] Basic weighted-average common shares outstanding