CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
REVENUES
Premiums earned, affiliated	$ 166,747	$ 154,246
Other income, affiliated	1,456	1,581
LOSSES AND EXPENSES
Losses and settlement expenses, affiliated	102,691	110,570
Amortization of deferred policy acquisition costs, affiliated	29,892	26,917
Other underwriting expenses, affiliated	22,715	22,920
Other expense, affiliated	$ 645	$ 498