v3.19.2

Investments and Fair Value Measurements (Maturity of Marketable Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost
Due less than one year	$ 248,374	$ 219,058
Due in one to five years	35,661	63,387
Total	284,035	282,445
Fair Value
Due less than one year	248,066	218,395
Due in one to five years	35,683	63,055
Total	$ 283,749	$ 281,450

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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