INVESTMENT SECURITIES (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Held-to-maturity Securities

(in thousands)	March 31, 2019
	Amortized cost, as adjusted		Gross unrealized holding gains		Gross unrealized holding losses		Estimated fair value
Short-term investments:
Obligations of domestic governmental agencies (maturing between April 2019 to March 2020) (held-to-maturity)	$	28,113	$	15	$	3	$	28,125
Total short-term investment securities	$	28,113	$	15	$	3	$	28,125

	December 31, 2018
	Amortized cost, as adjusted		Gross unrealized holding gains		Gross unrealized holding losses		Estimated fair value
Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2019 and November 2019) (held-to-maturity)	$	26,951	$	2	$	10	$	26,943
Total short-term investment securities	$	26,951	$	2	$	10	$	26,943