Reinsurance (Schedule of Reinsurance Ceded and Recoveries) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Premium Written :      
Direct $ 514,223 $ 473,233 $ 458,020
Assumed   (15) 2,007
Ceded premiums written (157,279) (148,866) (99,262)
Net premiums written 356,944 324,352 360,765
Premium Earned:      
Direct 494,643 461,367 434,022
Assumed   327 3,204
Ceded (145,562) (140,477) (76,685)
Premiums Earned, Net, Property and Casualty 349,081 321,217 360,541
Reinsurance recoveries $ 89,892 $ 99,911 $ 45,456