Reinsurance (Affiliated Quota Share Reinsurance Agreements For All New And Renewal Business For The Indicated Coverage Period) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Everest Re [Member]
Related Party Transaction [Line Items]
Assuming Company	Bermuda Re
Everest Re [Member] | Bermuda Re [Member] | 01/01/2010-12/31/2010 [Member]
Related Party Transaction [Line Items]
Percent Ceded	44.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 150,000
Aggregate Limit	$ 325,000
Everest Re [Member] | Bermuda Re [Member] | 01/01/2011 -12/31/2011 [Member]
Related Party Transaction [Line Items]
Percent Ceded	50.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 150,000
Aggregate Limit	$ 300,000
Everest Re [Member] | Bermuda Re [Member] | 01/01/2012 -12/31/2014 [Member]
Related Party Transaction [Line Items]
Percent Ceded	50.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 100,000
Aggregate Limit	$ 200,000
Everest Re [Member] | Bermuda Re [Member] | 01/01/2015 -12/31/2016 [Member]
Related Party Transaction [Line Items]
Percent Ceded	50.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 162,500
Aggregate Limit	$ 325,000
Everest Re [Member] | Bermuda Re [Member] | 01/01/2017 [Member]
Related Party Transaction [Line Items]
Percent Ceded	60.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 219,000
Aggregate Limit	$ 438,000
Everest Re- Canadian Branch [Member] | Bermuda Re [Member] | 01/01/2010-12/31/2010 [Member]
Related Party Transaction [Line Items]
Percent Ceded	60.00%
Assuming Company	Bermuda Re
Type of Business	property business
Single Occurrence Limit	$ 350,000	[1]
Everest Re- Canadian Branch [Member] | Bermuda Re [Member] | 01/01/2011 -12/31/2011 [Member]
Related Party Transaction [Line Items]
Percent Ceded	60.00%
Assuming Company	Bermuda Re
Type of Business	property business
Single Occurrence Limit	$ 350,000	[1]
Everest Re- Canadian Branch [Member] | Bermuda Re [Member] | 01/01/2012 -12/31/2012 [Member]
Related Party Transaction [Line Items]
Percent Ceded	75.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 206,250	[1]
Aggregate Limit	$ 412,500
Everest Re- Canadian Branch [Member] | Bermuda Re [Member] | 01/01/2013 -12/31/2013 [Member]
Related Party Transaction [Line Items]
Percent Ceded	75.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 150,000	[1]
Aggregate Limit	$ 412,500
Everest Re- Canadian Branch [Member] | Bermuda Re [Member] | 01/01/2014 [Member]
Related Party Transaction [Line Items]
Percent Ceded	75.00%
Assuming Company	Bermuda Re
Type of Business	property / casualty business
Single Occurrence Limit	$ 262,500	[1]
Aggregate Limit	$ 412,500
Everest Canada [Member] | Everest Re- Canadian Branch [Member] | 01/01/2012 [Member]
Related Party Transaction [Line Items]
Percent Ceded	80.00%
Assuming Company	Everest Re- Canadian Branch
Type of Business	property business

[1] Amounts shown are Canadian dollars.