CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUES
Premiums earned, affiliated	$ 156,714	$ 148,460	$ 310,960	$ 292,071
Other income, affiliated	2,582	1,227	4,163	2,236
LOSSES AND EXPENSES
Losses and settlement expenses, affiliated	119,119	107,223	229,689	201,994
Amortization of deferred policy acquisition costs, affiliated	29,122	27,185	56,039	53,780
Other underwriting expenses, affiliated	22,458	20,146	45,378	40,839
Other expense, affiliated	$ 486	$ 514	$ 984	$ 981