XML 109 R81.htm IDEA: XBRL DOCUMENT v3.6.0.2
Reserve for Losses and Loss Expenses (Exposure to Environmental Claims) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Liability for Claims and Claims Adjustment Expense [Line Items]        
Losses and Loss expense reserves, Gross $ 29,962 $ 30,411 $ 30,653 $ 32,764
Liability for Asbestos and Environmental Claims, Net 22,716 23,161 22,994 25,167
Asbestos Claim [Member]        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Losses and Loss expense reserves, Gross 7,900      
Asbestos [Member]        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Losses and Loss expense reserves, Gross 7,847 8,024 8,751 8,897
Liability for Asbestos and Environmental Claims, Net 6,615 $ 6,793 $ 7,314 $ 7,518
Landfill Sites Related Claims [Member]        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Losses and Loss expense reserves, Gross 12,800      
Liability for Asbestos and Environmental Claims, Net 8,100      
Leaking Underground Storage Tanks Claims [Member]        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Losses and Loss expense reserves, Gross 9,300      
Liability for Asbestos and Environmental Claims, Net $ 8,000