SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of Repurchase Agreements [Abstract]

Schedule Of Repurchase Agreements [Table Text Block]

Securities sold under agreements to repurchase (repurchase agreements) as of the dates indicated consisted of the following:

	December 31,
	2020		2019
(In thousands)
Long-term repurchase agreement (1)(2)	$	300,000	$	100,000

Repurchase agreements mature as follows as of the indicated date:
		December 31,2020
	(In thousands)
	One year to three years	$	100,000
	Three to five years		200,000
	Total	$	300,000

			Weighted-Average
(Dollars in thousands)	Amount		Maturity (In Months)
Counterparty
JP Morgan Chase	$	100,000	13
Credit Suisse First Boston		200,000	49
	$	300,000

Schedule of Securities Sold Under Repurchase Agreements [Table Text Block]

The following securities were sold under agreements to repurchase:
		As of December 31, 2020
		Amortized				Approximate	Weighted
		Cost of				Fair Value	Average
		Underlying		Balance of		of Underlying	Interest Rate
Underlying Securities		Securities		Borrowing		Securities	of Security
(Dollars in thousands)
U.S. government-sponsored agencies	$	12,219	$	11,013	$	12,351		1.94	%
MBS		320,640		288,987		329,438		1.65	%
Total	$	332,859	$	300,000	$	341,789
Accrued interest receivable	$	753

		As of December 31, 2019
		Amortized				Approximate	Weighted
		Cost of				Fair Value	Average
		Underlying		Balance of		of Underlying	Interest Rate
Underlying Securities		Securities		Borrowing		Securities	of Security
(Dollars in thousands)
U.S. government-sponsored agencies	$	13,776	$	4,723	$	13,768	1.53	%
MBS		115,630		95,277		116,397	2.31	%
Total	$	129,406	$	100,000	$	130,165
Accrued interest receivable	$	347