Investment Securities (Schedule Of Amortized Cost And Fair Value By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2013
Schedule of Investments [Line Items]
AFS, Within 1 year, Amortized Cost	$ 39,989
AFS, After 1 year; within 5 years, Amortized Cost	3,578
AFS After 5 years; within 10 years, Amortized Cost	0
AFS After 10 years, Amortized Cost	13,655
AFS Subtotal, Amortized Cost	57,222
AFS Within 1 year, Fair Value	39,990
AFS After 1 year; within 5 years, Fair Value	3,682
AFS After 5 years; within 10 years, Fair Value	0
AFS After 10 years, Fair Value	13,655
AFS Subtotal, Fair Value	57,327
Securities available for sale, Amortized Cost	3,574,144	[1]		3,110,692	[2]
Securities available-for-sale	3,571,179	[1]	3,398,457	3,190,219	[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	4,274
HTM Subtotal, Amortized Cost	4,274
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	5,454
HTM Subtotal, Fair Value	5,454
Securities held to maturity, Amortized cost	4,274		0	0
Securities held to maturity, Fair Value	5,454
Government Agency Issued Mbs And Cmo [Member]
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost	3,327,379
Securities available-for-sale	3,324,332
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	189,543	[3]		216,780	[4]
Securities available-for-sale	189,520	[3]		216,790	[4]
Securities held to maturity, Amortized cost	0
Securities held to maturity, Fair Value	$ 0

[1] Includes $3.3 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, venture capital, and cost method investments.

[4] Includes restricted investments in FHLB-Cincinnati stock of $125.5 million and FRB stock of $66.0 million. The remainder is money market, venture capital, and cost method investments.