CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUES
Premiums earned, affiliated	$ 148,460	$ 145,101	$ 292,071	$ 286,816
Other income, affiliated	(49)	145	(320)	268
LOSSES AND EXPENSES
Losses and settlement expenses, affiliated	107,223	103,008	201,994	188,266
Amortization of deferred policy acquisition costs, affiliated	27,185	27,210	53,780	53,328
Other underwriting expenses, affiliated	18,870	17,549	38,283	34,520
Other expense, affiliated	$ 514	$ 496	$ 981	$ 933