Fair Value Of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Of Financial Instruments [Abstract]

Fair value of financial instruments [Table Text Block]

	Carrying Amount		Estimated Fair Value at June 30, 2018
(In thousands)			Level 1		Level 2		Level 3		Total
Financial Assets
Loans:
Business	$	4,990,298	$	—	$	—	$	4,890,517	$	4,890,517
Real estate - construction and land	967,151		—		—		962,276		962,276
Real estate - business	2,727,580		—		—		2,689,312		2,689,312
Real estate - personal	2,102,586		—		—		2,038,381		2,038,381
Consumer	2,012,644		—		—		1,976,911		1,976,911
Revolving home equity	374,557		—		—		367,886		367,886
Consumer credit card	775,214		—		—		720,044		720,044
Overdrafts	4,081		—		—		3,018		3,018
Total loans	13,954,111		—		—		13,648,345		13,648,345
Loans held for sale	20,352		—		20,352		—		20,352
Investment securities	8,560,285		913,833		7,517,367		129,085		8,560,285
Federal funds sold	31,500		31,500		—		—		31,500
Securities purchased under agreements to resell	700,000		—		—		680,830		680,830
Interest earning deposits with banks	114,947		114,947		—		—		114,947
Cash and due from banks	386,339		386,339		—		—		386,339
Derivative instruments	6,239		—		5,488		751		6,239
Assets held in trust for deferred compensation plan	13,790		13,790		—		—		13,790
Total	$	23,787,563	$	1,460,409	$	7,543,207	$	14,459,011	$	23,462,627
Financial Liabilities
Non-interest bearing deposits	$	6,876,756	$	6,876,756	$	—	$	—	$	6,876,756
Savings, interest checking and money market deposits	11,761,832		11,761,832		—		—		11,761,832
Time open and certificates of deposit	1,682,969		—		—		1,682,894		1,682,894
Federal funds purchased	131,685		131,685		—		—		131,685
Securities sold under agreements to repurchase	1,035,074		—		—		1,035,558		1,035,558
Other borrowings	9,291		—		7,682		1,609		9,291
Derivative instruments	19,846		—		19,779		67		19,846
Liabilities held in trust for deferred compensation plan	13,790		13,790		—		—		13,790
Total	$	21,531,243	$	18,784,063	$	27,461	$	2,720,128	$	21,531,652

	Carrying Amount		Estimated Fair Value at December 31, 2017
(In thousands)			Level 1		Level 2		Level 3		Total
Financial Assets
Loans:
Business	$	4,958,554	$	—	$	—	$	4,971,401	$	4,971,401
Real estate - construction and land	968,820		—		—		979,389		979,389
Real estate - business	2,697,452		—		—		2,702,598		2,702,598
Real estate - personal	2,062,787		—		—		2,060,443		2,060,443
Consumer	2,104,487		—		—		2,074,129		2,074,129
Revolving home equity	400,587		—		—		400,333		400,333
Consumer credit card	783,864		—		—		798,093		798,093
Overdrafts	7,123		—		—		7,123		7,123
Total loans	13,983,674		—		—		13,993,509		13,993,509
Loans held for sale	21,398		—		21,398		—		21,398
Investment securities	8,893,307		937,011		7,838,522		117,774		8,893,307
Federal funds sold	42,775		42,775		—		—		42,775
Securities purchased under agreements to resell	700,000		—		—		695,194		695,194
Interest earning deposits with banks	30,631		30,631		—		—		30,631
Cash and due from banks	438,439		438,439		—		—		438,439
Derivative instruments	8,349		—		7,723		626		8,349
Assets held in trust for deferred compensation plan	12,843		12,843		—		—		12,843
Total	$	24,131,416	$	1,461,699	$	7,867,643	$	14,807,103	$	24,136,445
Financial Liabilities
Non-interest bearing deposits	$	7,158,962	$	7,158,962	$	—	$	—	$	7,158,962
Savings, interest checking and money market deposits	11,499,620		11,499,620		—		—		11,499,620
Time open and certificates of deposit	1,766,864		—		—		1,768,780		1,768,780
Federal funds purchased	202,370		202,370		—		—		202,370
Securities sold under agreements to repurchase	1,304,768		—		—		1,305,375		1,305,375
Other borrowings	1,758		—		—		1,758		1,758
Derivative instruments	8,074		—		7,951		123		8,074
Liabilities held in trust for deferred compensation plan	12,843		12,843		—		—		12,843
Total	$	21,955,259	$	18,873,795	$	7,951	$	3,076,036	$	21,957,782