Schedule VI - Supplemental Information Concerning Property-Casualty Insurance Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Supplemental Information For Property, Casualty Insurance Underwriters [Abstract]      
Deferred Policy Acquisition Costs $ 20,366 $ 20,746 $ 22,586
Reserves for Unpaid Claims and Claim Adjustment Expenses 450,878 415,135 382,640
Unearned Premiums 216,407 196,826 185,303
Earned Premiums 349,081 321,217 360,541
Net Investment Income 13,969 12,383 12,884
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
Amortization of Deferred Policy Acquisition Costs 32,674 40,890 57,277
Paid Claims and Claims Adjustment Expenses 205,254 199,331 212,709
Premiums Written $ 356,944 $ 324,352 $ 360,765