Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Selected segment information

Segment Income Statement Data
($ in Thousands)	Corporate and Commercial Specialty			Community,  Consumer, and Business			Risk Management and Shared Services			Consolidated Total
Three Months Ended March 31, 2015
Net interest income	$	75,691		$	86,357		$	5,765		$	167,813
Noninterest income	12,613			65,514			1,949			80,076
Total revenue	88,304			151,871			7,714			247,889
Credit provision *	9,526			7,071			(12,097		)	4,500
Noninterest expense	34,460			118,543			21,252			174,255
Income (loss) before income taxes	44,318			26,257			(1,441		)	69,134
Income tax expense (benefit)	15,368			9,190			(2,096		)	22,462
Net income	$	28,950		$	17,067		$	655		$	46,672
Return on average allocated capital (ROT1CE) **	12.5		%	10.7		%	(1.1		)%	10.2		%
Three Months Ended March 31, 2014
Net interest income	$	74,065		$	72,251		$	18,657		$	164,973
Noninterest income	11,854			55,829			5,838			73,521
Total revenue	85,919			128,080			24,495			238,494
Credit provision *	13,032			4,948			(12,980		)	5,000
Noninterest expense	35,721			111,199			20,738			167,658
Income before income taxes	37,166			11,933			16,737			65,836
Income tax expense	13,008			4,176			3,453			20,637
Net income	$	24,158		$	7,757		$	13,284		$	45,199
Return on average allocated capital (ROT1CE) **	11.0		%	5.9		%	10.2		%	9.4		%
Segment Balance Sheet Data
($ in Thousands)	Corporate and Commercial Specialty			Community, Consumer, and Business			Risk Management and Shared Services			Consolidated Total
Average Balances for 1Q 2015
Average earning assets	$	9,218,844		$	8,525,399		$	6,403,783		$	24,148,026
Average loans	9,210,992			8,525,399			78,724			17,815,115
Average deposits	5,421,541			10,522,618			3,111,037			19,055,196
Average allocated capital (T1CE) **	$	942,764		$	647,375		$	214,078		$	1,804,217
Average Balances for 1Q 2014
Average earning assets	$	8,850,984		$	7,230,394		$	5,811,125		$	21,892,503
Average loans	8,843,070			7,230,394			91,153			16,164,617
Average deposits	5,241,027			9,539,887			2,209,358			16,990,272
Average allocated capital (T1CE) **	$	886,927		$	535,752		$	476,856		$	1,899,535

* The consolidated credit provision is equal to the actual reported provision for credit losses.

** The Federal Reserve establishes capital adequacy requirements for the Corporation, including Tier 1 capital. Tier 1 capital is comprised of common capital and certain redeemable, non-cumulative preferred stock. Average allocated capital represents average Tier 1 common equity which is defined as average Tier 1 capital excluding qualifying perpetual preferred stock and qualifying trust preferred securities. This is a non-GAAP financial measure. For segment reporting purposes, the ROT1CE reflects return on average allocated Tier 1 common equity ("T1CE"). The ROT1CE for the Risk Management and Shared Services segment and the Consolidated Total is inclusive of the annualized effect of the preferred stock dividends.