Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Selected segment information

Information about the Corporation’s segments is presented below.

Segment Income Statement Data
	Corporate and Commercial Specialty			Community, Consumer, and Business			Risk Management and Shared Services			Consolidated Total
For the Years Ended December 31,	($ in Thousands)
2016
Net interest income	$	328,603		$	350,551		$	28,119		$	707,273
Noninterest income	47,776			277,942			27,165			352,883
Total revenue	376,379			628,493			55,284			1,060,156
Credit provision*	50,397			24,185			(4,582		)	70,000
Noninterest expense	148,493			502,285			51,782			702,560
Income before income taxes	177,489			102,023			8,084			287,596
Income tax expense (benefit)	59,261			35,708			(7,647		)	87,322
Net income	$	118,228		$	66,315		$	15,731		$	200,274
Return on average allocated capital (ROCET1)**	11.0		%	10.5		%	2.8		%	9.9		%
2015
Net interest income	$	310,072		$	349,134		$	17,072		$	676,278
Noninterest income	46,742			265,503			17,112			329,357
Total revenue	356,814			614,637			34,184			1,005,635
Credit provision*	41,913			25,614			(30,027		)	37,500
Noninterest expense	141,912			492,284			64,151			698,347
Income before income taxes	172,989			96,739			60			269,788
Income tax expense (benefit)	59,200			33,859			(11,572		)	81,487
Net income	$	113,789		$	62,880		$	11,632		$	188,301
Return on average allocated capital (ROCET1)**	11.6		%	9.8		%	2.1		%	9.9		%
2014
Net interest income	$	296,717		$	310,444		$	73,806		$	680,967
Noninterest income	49,213			221,430			20,218			290,861
Total revenue	345,930			531,874			94,024			971,828
Credit provision*	46,857			23,934			(54,791		)	16,000
Noninterest expense	148,476			463,235			68,072			679,783
Income before income taxes	150,597			44,705			80,743			276,045
Income tax expense	50,039			15,647			19,850			85,536
Net income	$	100,558		$	29,058		$	60,893		$	190,509
Return on average allocated capital (ROCET1)**	11.1		%	5.1		%	13.9		%	9.9		%

Segment Balance Sheet Data
	Corporate and Commercial Specialty		Community, Consumer, and Business		Risk Management and Shared Services		Consolidated Total
Average Balance for:	($ in Thousands)
2016
Average earning assets	$	10,178,813	$	9,309,028	$	6,538,820	$	26,026,661
Average loans	10,169,300		9,307,723		173,644		19,650,667
Average deposits	5,904,238		11,451,759		3,649,775		21,005,772
Average allocated capital (CET1)**	$	1,070,598	$	629,540	$	240,253	$	1,940,391
2015
Average earning assets	$	9,383,971	$	8,810,015	$	6,377,101	$	24,571,087
Average loans	9,374,191		8,809,673		68,400		18,252,264
Average deposits	5,856,530		10,898,602		3,147,955		19,903,087
Average allocated capital (CET1)**	$	977,406	$	640,181	$	216,010	$	1,833,597
2014
Average earning assets	$	8,927,401	$	7,840,352	$	5,992,375	$	22,760,128
Average loans	8,915,498		7,840,352		83,144		16,838,994
Average deposits	5,148,195		10,061,495		2,437,394		17,647,084
Average allocated capital (CET1)**	$	903,500	$	564,303	$	402,806	$	1,870,609
* The consolidated credit provision is equal to the actual reported provision for credit losses.
** The Federal Reserve establishes capital adequacy requirements for the Corporation. Average allocated capital represents average common equity Tier 1, as defined by the Federal Reserve. For segment reporting purposes, the ROCET1, a non-GAAP financial measure, reflects return on average allocated common equity Tier 1 (“CET1”). The ROCET1 for the Risk Management and Shared Services segment and the Consolidated Total is inclusive of the annualized effect of the preferred stock dividends.