Investment Securities (Schedule Of Amortized Cost And Fair Value By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013	Sep. 30, 2013
Schedule of Investments [Line Items]
AFS, Within 1 year, Amortized Cost	$ 0
AFS, After 1 year; within 5 years, Amortized Cost	3,459
AFS After 5 years; within 10 years, Amortized Cost	0
AFS After 10 years, Amortized Cost	8,705
AFS Subtotal, Amortized Cost	12,164
AFS Within 1 year, Fair Value	0
AFS After 1 year; within 5 years, Fair Value	3,529
AFS After 5 years; within 10 years, Fair Value	0
AFS After 10 years, Fair Value	8,705
AFS Subtotal, Fair Value	12,234
Securities available for sale, Amortized Cost	3,527,756	[1]		3,168,118	[2]
Securities available-for-sale	3,534,671	[1]	3,398,457	3,186,943	[2]
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	4,286
HTM Subtotal, Amortized Cost	4,286
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	5,380
HTM Subtotal, Fair Value	5,380
Securities held to maturity, Amortized cost	4,286		0	0
Securities held to maturity, Fair Value	5,380
Government Agency Issued Mbs And Cmo [Member]
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost	3,333,473
Securities available-for-sale	3,340,550
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	182,119	[3]		228,709	[4]
Securities available-for-sale	181,887	[3]		228,692	[4]
Securities held to maturity, Amortized cost	0
Securities held to maturity, Fair Value	$ 0

[1] Includes $3.2 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.

[2] Includes $2.9 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.

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

[4] Includes restricted investments in FHLB-Cincinnati stock of $128.0 million and FRB stock of $66.0million. The remainder is money market, venture capital, and cost method investments.