Operating Segment Information

12 Months Ended

Dec. 31, 2016

Operating Segment Information [Abstract]

Segment Reporting Disclosure [Text Block]

OPERATING SEGMENT INFORMATION

We manage our operations and prepare management reports and other information with a primary focus on geographical area. Following the close of business on December 31, 2015, we completed the merger of our subsidiary banks and certain non-banking subsidiaries, including Zions Management Services Company (“ZMSC”), with and into a single bank, ZB, N.A. We continue to manage our banking operations under our existing brand names, including Zions Bank, Amegy Bank, California Bank & Trust, National Bank of Arizona, Nevada State Bank, Vectra Bank Colorado, and The Commerce Bank of Washington. Performance assessment and resource allocation are based upon this geographical structure. Due to the charter consolidation, we have moved to an internal Funds Transfer Pricing (“FTP”) allocation system to report results of operations for business segments. This process continues to be refined. Total loans and deposits presented for the banking segments do not include intercompany amounts between banking segments, but may include deposits with the Other segment. Prior period amounts have been reclassified to reflect these changes.

As of December 31, 2016, our banking business is conducted through seven locally managed and branded segments in distinct geographical areas. Performance assessment and resource allocation are based upon this geographical structure. Zions Bank operates 98 branches in Utah, 23 branches in Idaho, and one branch in Wyoming. CB&T operates 93 branches in California. Amegy operates 74 branches in Texas. NBAZ operates 58 branches in Arizona. NSB operates 50 branches in Nevada. Vectra operates 36 branches in Colorado and one branch in New Mexico. TCBW operates one branch in Washington and one branch in Oregon.

The operating segment identified as “Other” includes the Parent, Zions Management Services Company (which was merged into Zions First National Bank on December 31, 2015), certain nonbank financial service subsidiaries, centralized back-office functions of the Bank, the Parent and eliminations of transactions between segments. The major components of net interest income at the Bank’s back-office include the revenue associated with the investments securities portfolio and the offset of the FTP costs and benefits provided to the business segments. Throughout 2016 consolidation efforts continued, which resulted in transitioning full-time equivalent from the business segments to the Company’s back-office units. Due to the continuing nature and timing of this change, the Company’s back-office units retained more direct expenses in 2016 than in prior years. With the consolidation efforts largely completed, allocations of these expenses in future periods to the business segments will result in the “Other” segment’s noninterest expenses that are more consistent with historical levels going forward.

The following schedule does not present total assets or income tax expense for each operating segment, but instead presents total loans, total deposits and income before income taxes because these are the metrics that management uses when evaluating and making decisions pertaining to the operating segments. The major components at the Parent include net interest income, which includes interest expense on other borrowed funds, net impairment losses on investment securities, and losses from the sale of the remaining CDO portfolio. The Parent’s financial statements in Note 23 provide more information about the Parent’s activities. The condensed statement of income identifies the components of income and expense which affect the operating amounts presented in the Other segment.

The accounting policies of the individual operating segments are the same as those of the Company. Transactions between operating segments are primarily conducted at fair value, resulting in profits that are eliminated for reporting consolidated results of operations.

The following is a summary of selected operating segment information:

(In millions)	Zions Bank									Amegy						CB&T
	2016			2015			2014			2016		2015		2014		2016			2015			2014
SELECTED INCOME STATEMENT DATA
Net interest income	$	633.1		$	614.9		$	628.8		$	479.5	$	475.4	$	466.4	$	450.0		$	425.6		$	444.1
Provision for loan losses	(21.6		)	(28.3		)	(58.5		)	163.0		91.3		32.2		(9.1		)	(4.4		)	(20.1		)
Net interest income after provision for loan losses	654.7			643.2			687.3			316.5		384.1		434.2		459.1			430.0			464.2
Noninterest income	148.6			132.7			143.0			122.5		120.6		127.5		67.2			63.4			60.6
Noninterest expense	392.5			430.7			439.9			317.1		372.7		357.3		268.2			294.2			321.3
Income (loss) before income taxes	$	410.8		$	345.2		$	390.4		$	121.9	$	132.0	$	204.4	$	258.1		$	199.2		$	203.5
SELECTED BALANCE SHEET DATA
Total loans	$	12,560		$	12,232		$	12,172		$	10,557	$	10,115	$	10,077	$	9,381		$	8,832		$	8,530
Total deposits	16,764			16,233			16,214			11,924		11,677		11,491		10,969			10,520			9,707

(In millions)	NBAZ								NSB									Vectra
	2016			2015		2014			2016			2015			2014			2016			2015		2014
SELECTED INCOME STATEMENT DATA
Net interest income	$	196.7		$	181.8	$	181.1		$	124.8		$	125.3		$	125.4		$	123.1		$	117.2	$	114.0
Provision for loan losses	(3.1		)	7.9		(21.5		)	(28.4		)	(28.3		)	(20.9		)	(7.9		)	4.7		(8.4		)
Net interest income after provision for loan losses	199.8			173.9		202.6			153.2			153.6			146.3			131.0			112.5		122.4
Noninterest income	39.7			36.1		33.5			39.4			36.3			34.9			22.8			21.3		22.3
Noninterest expense	129.9			132.7		145.1			123.5			131.3			132.7			87.3			97.6		98.3
Income (loss) before income taxes	$	109.6		$	77.3	$	91.0		$	69.1		$	58.6		$	48.5		$	66.5		$	36.2	$	46.4
SELECTED BALANCE SHEET DATA
Total loans	$	4,292		$	3,909	$	3,750		$	2,344		$	2,285		$	2,421		$	2,528		$	2,468	$	2,320
Total deposits	4,609			4,369		4,133			4,243			4,035			3,690			2,842			2,889		2,591

(In millions)	TCBW									Other									Consolidated Company
	2016			2015			2014			2016			2015			2014			2016		2015		2014
SELECTED INCOME STATEMENT DATA
Net interest income	$	39.5		$	34.6		$	34.6		$	(179.3	)	$	(259.5	)	$	(314.4	)	$	1,867.4	$	1,715.3	$	1,680.0
Provision for loan losses	(0.2		)	(2.9		)	(0.9		)	0.1			—			—			92.8		40.0		(98.1		)
Net interest income after provision for loan losses	39.7			37.5			35.5			(179.4		)	(259.5		)	(314.4		)	1,774.6		1,675.3		1,778.1
Noninterest income	4.6			4.1			4.1			70.8			(57.3		)	66.8			515.6		357.2		492.7
Noninterest expense	18.6			16.5			33.4			248.2			104.9			121.4			1,585.3		1,580.6		1,649.4
Income (loss) before income taxes	$	25.7		$	25.1		$	6.2		$	(356.8	)	$	(421.7	)	$	(369.0	)	$	704.9	$	451.9	$	621.4
SELECTED BALANCE SHEET DATA
Total loans	$	870		$	704		$	713		$	117		$	105		$	81		$	42,649	$	40,650	$	40,064
Total deposits	1,161			986			816			724			(335		)	(794		)	53,236		50,374		47,848