Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investments:
Fixed income securities (Amortized cost: 2019, $783,047; 2018, $600,504)	$ 795,538	$ 592,645
Equity securities	76,812	66,422
Limited partnerships	23,292	55,044
Commercial mortgage loans	11,782	6,672
Short-term and other	1,000	1,000
Total Investments	908,424	721,783
Cash and cash equivalents	67,851	163,996
Restricted cash and cash equivalents	21,037	6,815
Accounts receivable--less allowance (2019, $2,233; 2018, $403)	111,762	102,972
Accrued investment income	4,882	4,358
Reinsurance recoverable	432,067	392,436
Prepaid reinsurance premiums	5,820	6,095
Deferred policy acquisition costs	8,496	6,568
Property and equipment--less accumulated depreciation (2019, $20,091; 2018, $19,531)	42,542	46,645
OtherAssets	24,566	24,760
Current federal income taxes	4,878	7,441
Deferred federal income taxes	2,035	6,262
Total Assets	1,634,360	1,490,131
Reserves:
Losses and loss expenses	988,305	865,339
Unearned premiums	74,810	71,625
Total Reserves	1,063,115	936,964
Reinsurance payable	65,835	66,632
Short-term borrowings	20,000	20,000
Depository liabilities	18	173
AccountsPayableAndOtherAccruedLiabilities	121,076	110,280
Total Liabilities	1,270,044	1,134,049
Shareholders' equity:
Additional paid-in capital	53,349	54,720
Accumulated other comprehensive income (loss)	9,369	(7,347)
Retained earnings	300,988	308,075
Total Shareholders' Equity	364,316	356,082
Total Liabilities and Shareholders' Equity	1,634,360	1,490,131
Class A Voting [Member]
Shareholders' equity:
Common stock	111	112
Class B Non-voting [Member]
Shareholders' equity:
Common stock	$ 499	$ 522