Investments (Tables)

6 Months Ended

Jun. 30, 2018

Investments Debt And Equity Securities [Abstract]

Schedule of Available-for-Sale Securities

The Company has determined that all of its investments are classified as available-for-sale. Available-for-sale debt securities are carried at fair value with interest on these investments included in interest income and are recorded based primarily on quoted market prices. Available-for-sale investments consisted of the following at June 30, 2018:

			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(In thousands)	Cost		Gains		Losses			Value
Short Term Investments	$	148,448	$	8	$	(85	)	$	148,371

Schedule of Changes in Accumulated Other Comprehensive (Loss) Income

The changes in AOCI associated with the unrealized holding losses on available-for-sale investments during the six-month period ended June 30, 2018, were as follows (in thousands):

(In thousands)	Net Unrealized Gains (Losses) on Marketable Securities
Balance at December 31, 2017	$	—
Other comprehensive loss before reclassifications		(170	)
Amounts reclassified from accumulated other comprehensive income		—
Net current period other comprehensive loss		(170	)
Balance at June 30, 2018	$	(170	)