Reserves for Unpaid Losses and Loss Adjustment Expenses (Activity in the Reserves for Unpaid Losses and Loss Adjustment Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reserves for Unpaid Losses and Loss Adjustment Expenses [Abstract]      
Balance at January 1 $ 415,135 $ 382,640 $ 313,416
Less reinsurance recoverable 91,943 70,172 49,584
Net Balance at January 1 323,192 312,468 263,832
Incurred related to:      
Claims and Claim Adjustment Expenses Incurred Related to Current Year 237,102 215,258 251,391
Claims and Claim Adjustment Expenses Incurred Related to Prior Years (6,953) (5,203) 9,954
Total incurred 230,149 210,055 261,345
Paid related to:      
Current year 83,132 76,231 101,897
Prior years 122,122 123,100 110,812
Total paid 205,254 199,331 212,709
Net Balance at December 31 348,087 323,192 312,468
Plus reinsurance recoverable 102,791 91,943 70,172
Balance at December 31 $ 450,878 $ 415,135 $ 382,640