CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Net income		$ 625	$ 4,188
Other comprehensive income, net of tax:
Reclassification of realized loss (gain) included in earnings		1,078	(3,122)
Reclassification into retained earnings	[1]	932	0
Reclassification of other-than-temporary impairment loss included in earnings		63	366
Total before income taxes		1,261	1,153
Income tax expense	[2]	(632)	(441)
Total other comprehensive income (loss), net of tax		629	712
Total comprehensive income, net of tax		1,254	4,900
Income tax expense related to adoption of ASU 2018-02		(300)
Available-for-sale investments
Other comprehensive income, net of tax:
Net unrealized (loss) gain on investments		(803)	3,905
Restricted investments
Other comprehensive income, net of tax:
Net unrealized (loss) gain on investments		$ (9)	$ 4

[1] (1) The reclassification into retained earnings relates to the adoption of Accounting Standards Update (“ASU”) 2016-01 Financial Instruments - Overall, as amended (“ASU 2016-01”). The new guidance is effective January 1, 2018, and requires equity investments to be measured at fair value with changes in fair value recognized in results of operations rather than the condensed consolidated statements of comprehensive income. See Note 2. Summary of Significant Accounting Policies.

[2] (2) Income tax expense includes $0.3 million of income tax expense related to the adoption of ASU 2018-02 Income Statement - Reporting Comprehensive Income (“ASU 2018-02”). The new guidance is effective January 1, 2018 and allows a reclassification from accumulated other comprehensive income (loss) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the “Tax Act”). See Note 2. Summary of Significant Accounting Policies.