Unaudited Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investments:
Fixed maturities	$ 450,443	$ 451,809
Equity securities	162,591	162,107
Limited partnerships	84,569	81,230
Short-term	2,968	2,966
Total Investments	700,571	698,112
Cash and cash equivalents	48,913	64,632
Accounts receivable	93,071	98,144
Reinsurance recoverable	214,122	220,221
Other assets	67,200	61,447
Current federal income taxes	2,581	1,691
Total Assets	1,126,458	1,144,247
Liabilities and shareholders' equity
Reserves for losses and loss expenses	505,887	506,102
Reserves for unearned premiums	33,011	35,019
Short-term borrowings	20,000	20,000
Accounts payable and accrued expenses	142,753	163,657
Deferred federal income taxes	21,523	19,973
Total Liabilities	723,174	744,751
Shareholders' equity:
Additional paid-in capital	52,816	51,854
Unrealized net gains on investments	52,976	51,840
Foreign exchange adjustment	(389)	390
Retained earnings	297,240	294,773
Shareholders' equity	403,284	399,496
Total liabilities and shareholders' equity	1,126,458	1,144,247
Class A voting [Member]
Shareholders' equity:
Common stock	112	112
Class B non-voting [Member]
Shareholders' equity:
Common stock	$ 529	$ 527