Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2014

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

								To Be Well Capitalized
					For Capital Adequacy			Under Prompt Corrective
	Actual				Purposes			Action Provisions:(2)
($ in Thousands)	Amount		Ratio(1)		Amount		Ratio(1)	Amount		Ratio(1)
As of December 31, 2014:
Associated Banc-Corp
Total Capital	$	2,350,898	12.66	%	$	1,485,412	³8.00%
Tier 1 Capital		1,868,059	10.06			742,706	³4.00%
Leverage		1,868,059	7.48			998,967	³4.00%
Associated Bank, N.A.
Total Capital	$	2,449,514	13.26	%	$	1,477,785	³8.00%	$	1,847,231	³ 10.00%
Tier 1 Capital		2,217,861	12.01			738,892	³4.00%		1,108,339	³ 6.00%
Leverage		2,217,861	8.92			994,103	³4.00%		1,242,628	³ 5.00%
As of December 31, 2013:
Associated Banc-Corp
Total Capital	$	2,184,884	13.09	%	$	1,335,532	³8.00%
Tier 1 Capital		1,975,182	11.83			667,766	³4.00%
Leverage		1,975,182	8.70			907,937	³4.00%
Associated Bank, N.A.
Total Capital	$	2,425,188	14.70	%	$	1,319,765	³8.00%	$	1,649,707	³ 10.00%
Tier 1 Capital		2,217,987	13.44			659,883	³4.00%		989,824	³ 6.00%
Leverage		2,217,987	9.90			896,419	³4.00%		1,120,524	³ 5.00%

• Total Capital ratio is defined as Tier 1 capital plus Tier 2 capital divided by total risk-weighted assets. The Tier 1 Capital ratio is defined as Tier 1 capital divided by total risk-weighted assets. The leverage ratio is defined as Tier 1 capital divided by the most recent quarter's average total assets.
•  Prompt corrective action provisions are not applicable at the bank holding company level