Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investments:
Fixed maturities (Amortized cost: 2017, $521,017; 2016, $494,561)	$ 521,853	$ 491,904
Equity securities (Cost: 2017, $130,751; 2016, $64,902)	201,763	119,945
Limited partnerships (Affiliated: 2017, $43,586; 2016, $44,038)	70,806	76,469
Short-term and other	1,000	1,500
Total Investments	795,422	689,818
Cash and cash equivalents	64,680	62,976
Accounts receivable--less allowance (2017, $484; 2016, $542)	87,551	64,984
Accrued investment income	4,159	3,882
Reinsurance recoverable	318,331	255,024
Prepaid reinsurance premiums	4,578	2,674
Deferred policy acquisition costs	5,608	1,172
Property and equipment--less accumulated depreciation (2017, $16,614; 2016, $15,328)	47,317	47,225
Restricted cash and short-term investments	11,402	0
Other assets	11,030	23,779
Current federal income taxes recoverable	6,938	2,603
Total Assets	1,357,016	1,154,137
Reserves:
Losses and loss expenses	680,274	576,330
Unearned premiums	53,085	21,694
Total Reserves	733,359	598,024
Reinsurance payable	62,308	43,150
Short-term borrowings	20,000	20,000
Depository liabilities	3,050	9,910
Accounts payable and other liabilities	105,130	67,296
Deferred federal income taxes	14,358	11,412
Total Liabilities	938,205	749,792
Shareholders' equity:
Additional paid-in capital	55,078	54,286
Unrealized net gains on investments	46,700	34,051
Foreign exchange adjustment	(309)	(831)
Retained earnings	316,700	316,195
Shareholders' equity	418,811	404,345
Total liabilities and shareholders' equity	1,357,016	1,154,137
Class A Voting [Member]
Shareholders' equity:
Common stock	112	112
Class B Non-voting [Member]
Shareholders' equity:
Common stock	$ 530	$ 532