3. Trading Securities (Tables)

12 Months Ended

Dec. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of short-term investments

	Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
	(In thousands)
Security Type
December 31, 2019:
Trading securities - debt	$	93,712	$	143	$	(12	)	$	93,843
Trading securities - equity		17,674		211		(745	)		17,140
	$	111,386	$	354	$	(757	)	$	110,983
December 31, 2018:
Trading securities - debt	$	33,643	$	18	$	(19	)	$	33,642
Trading securities - equity		3,389		27		(404	)		3,012
	$	37,032	$	45	$	(423	)	$	36,654