CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 6,141	$ 2,696	$ 20,943	$ 12,830
Other comprehensive (loss) income, net of tax:
Reclassification of realized loss (gain) included in earnings	104	(40)	(10,757)	(40)
Reclassification of other-than-temporary impairment loss included in earnings	403	0	769	0
Total before income taxes	(172)	3,217	(6,017)	3,219
Income tax (expense) benefit	(75)	(1,238)	2,319	(1,239)
Total other comprehensive income (loss), net of tax	(247)	1,979	(3,698)	1,980
Total comprehensive income, net of tax	5,894	4,675	17,245	14,810
Available-for-sale investments
Other comprehensive (loss) income, net of tax:
Net unrealized (loss) gain on investments	(683)	3,257	3,967	3,259
Restricted investments
Other comprehensive (loss) income, net of tax:
Net unrealized (loss) gain on investments	$ 4	$ 0	$ 4	$ 0