Borrowings (Tables) - Debt Instrument [Domain]

9 Months Ended

Sep. 30, 2017

Schedule Of Fed Funds Purchased And Assets Sold Under Agreements To Repurchase Table [Text Block]

(In thousands)	September 30, 2017		December 31, 2016
Assets sold under agreements to repurchase	$	374,405	$	479,425
Total assets sold under agreements to repurchase	$	374,405	$	479,425

Schedule of Repurchase Agreements [Table Text Block]

		September 30, 2017		December 31, 2016
			Repurchase		Repurchase
(In thousands)			liability		liability
U.S. Treasury Securities
	Within 30 days	$	69,030	$	32,700
	After 30 to 90 days		53,781		-
	After 90 days		142,306		19,819
Total U.S. Treasury Securities			265,117		52,519
Obligations of U.S. government sponsored entities
	Within 30 days		-		95,720
	After 30 to 90 days		30,835		142,299
	After 90 days		35,400		25,380
Total obligations of U.S. government sponsored entities			66,235		263,399
Mortgage-backed securities
	Within 30 days		-		39,108
	After 30 to 90 days		-		58,552
	After 90 days		31,383		54,560
Total mortgage-backed securities			31,383		152,220
Collateralized mortgage obligations
	Within 30 days		11,670		11,287
Total collateralized mortgage obligations			11,670		11,287
Total		$	374,405	$	479,425

Schedule of Short-term Debt [Table Text Block]

(In thousands)	September 30, 2017		December 31, 2016
Advances with the FHLB paying interest at maturity with fixed rates ranging from 1.32% to 1.44%	$	239,398	$	-
Others		1,200		1,200
Total other short-term borrowings	$	240,598	$	1,200
Note: Refer to the Corporation's 2016 Form 10-K for rates information at December 31, 2016.

Schedule of Notes Payable [Table Text Block]

(In thousands)		September 30, 2017		December 31, 2016
Advances with the FHLB with maturities ranging from 2017 through 2029 paying interest at
	monthly fixed rates ranging from 0.81% to 4.19 %	$	569,889	$	608,193
Advances with the FHLB with maturities ranging from 2018 through 2019 paying interest monthly
	at a floating rate ranging from 0.22% to 0.34% over the 1 month LIBOR		34,164		34,164
Advances with the FHLB with maturities ranging from 2018 through 2019 paying interest quarterly
	at a floating rate from 0.09% to 0.24% over the 3 month LIBOR		25,019		30,313
Unsecured senior debt securities maturing on 2019 paying interest semiannually at a
	fixed rate of 7.00%, net of debt issuance costs of $3,648 (2016 - $5,212)		446,351		444,788
Junior subordinated deferrable interest debentures (related to trust preferred securities)
	with maturities ranging from 2027 to 2034 with fixed interest rates ranging from
	6.125% to 8.327%, net of debt issuance costs of $456 (2016 - $476)		439,344		439,323
Others			17,294		18,071
Total notes payable		$	1,532,061	$	1,574,852

Maturity Distribution Of Debt Securities [Text Block]

	Assets sold under			Short-term
(In thousands)	agreements to repurchase			borrowings	Notes payable		Total
Year
2017	$	165,315	$	205,598	$	32,536	$	403,449
2018		209,090		35,000		220,086		464,176
2019		-		-		608,530		608,530
2020		-		-		112,088		112,088
2021		-		-		21,694		21,694
Later years		-		-		537,127		537,127
Total borrowings	$	374,405	$	240,598	$	1,532,061	$	2,147,064