Goodwill And Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Amortizing Intangible Assets

	Gross carrying amount				Accumulated amortization						Net carrying amount
(In thousands)	2016		2015		2016			2015			2016		2015
Core deposit intangibles	$	166,518	$	166,518	$	(158,444	)	$	(151,157	)	$	8,074	$	15,361
Customer relationships and other intangibles	28,014		28,014		(27,668		)	(27,103		)	346		911
Total	$	194,532	$	194,532	$	(186,112	)	$	(178,260	)	$	8,420	$	16,272

Schedule Of Estimated Amortization Expense

(In thousands)
2017	$	6,404
2018	1,557
2019	459
2020	—
2021	—

Schedule Of Goodwill

(In thousands)	Zions Bank		CB&T		Amegy		Consolidated Company
Balance at December 31, 2014	$	19,514	$	379,024	$	615,591	$	1,014,129
Impairment losses	—		—		—		—
Balance at December 31, 2015	19,514		379,024		615,591		1,014,129
Impairment losses	—		—		—		—
Balance at December 31, 2016	$	19,514	$	379,024	$	615,591	$	1,014,129