INVESTMENT SECURITIES - FREDDIE MAC PREFERRED STOCK (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2008	Dec. 31, 2018
Investment securities
Number of securities held	173		182
Available-for-sale debt securities	$ 471,355,000		$ 475,738,000
Freddie Mac preferred stock
Investment securities
Number of securities held		40,000
Other Than Temporary Impairment ("OTTI") charge		$ 2,100,000
Available-for-sale debt securities		$ 0
Total unrealized gain	$ 714,000

Number of securities held as of a point in time.

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Amount 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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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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