3. Trading Securities (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Cost	$ 111,386	$ 37,032
Gross unrealized gain	354	45
Gross unrealized loss	(757)	(423)
Fair value	11,093	36,654
Trading securities - Debt [Member]
Cost	93,712	33,643
Gross unrealized gain	143	18
Gross unrealized loss	(12)	(19)
Fair value	93,843	33,642
Trading securities - Equity [Member]
Cost	17,674	3,389
Gross unrealized gain	211	27
Gross unrealized loss	(745)	(404)
Fair value	$ 17,140	$ 3,012

Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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