CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
REVENUES
Premiums earned, affiliated	$ 143,611	$ 141,715
Other income, affiliated	(271)	123
LOSSES AND EXPENSES
Losses and settlement expenses, affiliated	94,771	85,258
Amortization of deferred policy acquisition costs, affiliated	26,595	26,118
Other underwriting expenses, affiliated	19,413	16,971
Other expense, affiliated	$ 467	$ 437