Earnings Per Common Share (Schedule Of Net Income (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Common Share [Abstract]
Net income (loss) attributable to Everest Re Group	$ 209,057	$ 290,184	$ 532,035	$ 584,117
Less: dividends declared-common shares and nonvested common shares	(41,955)	(34,319)	(84,207)	(69,061)
Undistributed earnings	$ 167,102	$ 255,865	$ 447,828	$ 515,056
Percentage allocated to common shareholders	98.90%	98.90%	98.90%	99.00%
Net income (loss) available to common stockholders, total	$ 165,306	$ 253,146	$ 443,046	$ 509,853
Add: dividends declared-common shareholders	41,529	33,971	83,345	68,362
Numerator for basic and diluted earnings per common share	$ 206,835	$ 287,117	$ 526,391	$ 578,215
Denominator for basic earnings per weighted-average common shares	43,804	45,441	43,915	45,957
Effect of dilutive securities: Options	393	423	405	431
Denominator for diluted earnings per adjusted weighted-average common shares	44,197	45,864	44,320	46,388
Basic	$ 4.72	$ 6.32	$ 11.99	$ 12.58
Diluted	$ 4.68	$ 6.26	$ 11.88	$ 12.46
Basic weighted-average common shares outstanding	43,804	45,441	43,915	45,957
Basic weighted-average common shares outstanding and nonvested common shares expected to vest	44,280	45,929	44,389	46,426