Borrowings (Tables)

12 Months Ended

Dec. 31, 2020

Debt Instrument [Domain]

Schedule of Repurchase Agreements

		December 31, 2020				December 31, 2019
				Repurchase liability				Repurchase liability
			Repurchase	weighted average			Repurchase	weighted average
(Dollars in thousands)			liability	interest rate			liability	interest rate
U.S. Treasury securities
	Within 30 days	$	67,157	1.16	%	$	88,646	2.59	%
	After 30 to 90 days		39,318	1.20			78,061	2.36
	After 90 days		9,979	0.33			24,538	2.52
Total U.S. Treasury securities			116,454	1.10			191,245	2.49
Mortgage-backed securities
	Within 30 days		3,778	0.28			1,235	0.30
	After 30 to 90 days		268	1.50			-	-
Total mortgage-backed securities			4,046	0.36			1,235	0.30
Collateralized mortgage obligations
	Within 30 days		803	0.24			898	0.24
Total collateralized mortgage obligations			803	0.24			898	0.24
Total		$	121,303	1.07	%	$	193,378	2.46	%

Notes Payable

(In thousands)	December 31, 2020		December 31, 2019
Advances with the FHLB with maturities ranging from 2021 through 2029 paying interest at monthly fixed rates ranging from 0.39% to 4.19% (2019 - 1.14% to 4.19%)	$	542,469	$	421,399
Advances with the FRB maturing on 2022 paying interest at annual fixed rate of 0.35%		1,009		-
Unsecured senior debt securities maturing on 2023 paying interest semiannually at a fixed rate of 6.125%, net of debt issuance costs of $3,426 (2019 - $4,693)		296,574		295,307
Junior subordinated deferrable interest debentures (related to trust preferred securities) with maturities ranging from 2033 to 2034 with fixed interest rates ranging from 6.125% to 6.7%, net of debt issuance costs of $369 (2019 - $396)		384,929		384,902
Total notes payable	$	1,224,981	$	1,101,608

Maturity distribution of debt securities

		Assets sold under
(In thousands)		agreements to repurchase		Notes payable	Total
2021	$	121,303	$	50,040	$	171,343
2022		-		104,156		104,156
2023		-		339,835		339,835
2024		-		91,944		91,944
2025		-		139,920		139,920
Later years		-		499,086		499,086
Total borrowings	$	121,303	$	1,224,981	$	1,346,284

Federal Funds Purchased And Securities Sold Under Agreements To Repurchase

Schedule Of Maximum Aggregate Balance Average Aggregate Balance And Weighted Average Interest Rate [Text Block]

Assets sold under agreements to repurchase:
(Dollars in thousands)			2020			2019
Maximum aggregate balance outstanding at any month-end		$	195,498		$	281,833
Average monthly aggregate balance outstanding		$	143,718		$	222,565
Weighted average interest rate:
	For the year		1.63	%		2.64	%
	At December 31		1.11	%		2.50	%

Short term borrowings

Schedule Of Maximum Aggregate Balance Average Aggregate Balance And Weighted Average Interest Rate [Text Block]

Other short-term borrowings:
(Dollars in thousands)			2020			2019
Maximum aggregate balance outstanding at any month-end		$	100,000		$	160,000
Average monthly aggregate balance outstanding		$	21,557		$	8,703
Weighted average interest rate:
	For the year		0.56	%		2.50	%
	At December 31		0.73	%		1.85	%