CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES
Premiums earned (affiliated $586,609, $566,103 and $534,105)	$ 592,408	$ 570,266	$ 540,722
Net investment income	47,490	45,582	46,465
Net realized investment gains, excluding impairment losses on securities available-for-sale	5,338	7,634	5,227
Total other-than-temporary impairment losses on securities available-for-sale	(1,264)	(1,481)	(878)
Portion of other-than-temporary impairment losses on fixed maturity securities available-for-sale reclassified from other comprehensive income (before taxes)	0	0	0
Net impairment losses on securities available-for-sale	(1,264)	(1,481)	(878)
Net realized investment gains	4,074	6,153	4,349
Other income (affiliated $1,021, $1,214 and $1,784)	1,011	1,725	2,931
Total revenues	644,983	623,726	594,467
LOSSES AND EXPENSES
Losses and settlement expenses (affiliated $385,708, $368,722 and $378,263)	386,897	370,736	385,474
Dividends to policyholders (all affiliated)	13,800	7,705	9,504
Amortization of deferred policy acquisition costs (affiliated $106,931, $101,090 and $97,551)	108,403	102,184	99,042
Other underwriting expenses (affiliated $69,560, $68,305 and $57,148)	69,612	68,418	56,826
Interest expense (all affiliated)	337	337	337
Other expenses (affiliated $1,860, $1,822 and $1,570)	2,727	2,690	2,377
Total losses and expenses	581,776	552,070	553,560
Income before income tax expense	63,207	71,656	40,907
INCOME TAX EXPENSE (BENEFIT)
Current	18,061	18,611	7,280
Deferred	(1,057)	2,883	3,635
Total income tax expense	17,004	21,494	10,915
Net income	$ 46,203	$ 50,162	$ 29,992
Net income per common share - basic and diluted	$ 2.20	$ 2.43	$ 1.48
Average number of common shares outstanding - basic and diluted (in shares)	21,006,302	20,621,919	20,205,935