Investment Securities (Schedule Of Amortized Cost And Fair Value By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013	Jun. 30, 2013
Schedule of Investments [Line Items]
AFS, Within 1 year, Amortized Cost	$ 39,995
AFS, After 1 year; within 5 years, Amortized Cost	3,473
AFS After 5 years; within 10 years, Amortized Cost	0
AFS After 10 years, Amortized Cost	13,655
AFS Subtotal, Amortized Cost	57,123
AFS Within 1 year, Fair Value	39,999
AFS After 1 year; within 5 years, Fair Value	3,561
AFS After 5 years; within 10 years, Fair Value	0
AFS After 10 years, Fair Value	13,655
AFS Subtotal, Fair Value	57,215
Securities available for sale, Amortized Cost	3,551,256	[1]		3,212,355	[2],[3]
Securities available-for-sale	3,576,542	[1]	3,398,457	3,228,379	[2],[4]
HTM, Within 1 year, Amortized Cost	0
HTM, After 1 year; within 5 years, Amortized Cost	0
HTM, After 5 years; within 10 years, Amortized Cost	0
HTM, After 10 years, Amortized Cost	4,279
HTM Subtotal, Amortized Cost	4,279
HTM, Within 1 year, Fair Value	0
HTM, After 1 year; within 5 years, Fair Value	0
HTM, After 5 years; within 10 years, Fair Value	0
HTM, After 10 years, Fair Value	5,556
HTM Subtotal, Fair Value	5,556
Securities held to maturity, Amortized cost	4,279		0	0
Securities held to maturity, Fair Value	5,556
Government Agency Issued Mbs And Cmo [Member]
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost	3,307,027
Securities available-for-sale	3,332,230
Securities held to maturity, Amortized cost	0
Securities held to maturity, Fair Value	0
Equity And Other Debt Securities [Member]
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost	187,106	[5]		223,241	[6]
Securities available-for-sale	187,097	[5]		223,283	[6]
Securities held to maturity, Amortized cost	0
Securities held to maturity, Fair Value	$ 0

[1] Includes $3.4 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.

[2] Includes $3.0 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.

[3] Balance has been re-presented due to purchase accounting adjustments made in third quarter 2013.

[4] June 30, 2013 balance has been re-presented due to purchase accounting adjustments made in third quarter 2013.

[5] Includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $66.0 million. The remainder is money market, venture capital, and cost method investments.

[6] Includes restricted investments in FHLB-Cincinnati stock of $128.0 million and FRB stock of $66.2 million. The remainder is money market, venture capital, and cost method investments.