Investment Securities (Schedule Of Amortized Cost And Fair Value By Contractual Maturity) (Details) - USD ($)		Sep. 30, 2015		Dec. 31, 2014	Sep. 30, 2014
Schedule of Investments [Line Items]
Within 1 year, Amortized Cost		$ 2,943,000
After 1 year; within 5 years, Amortized Cost		100,000
After 5 years; within 10 years, Amortized Cost		0
After 10 years, Amortized Cost		7,655,000
Subtotal, Amortized Cost		10,698,000
Within 1 year, Fair Value		2,946,000
After 1 year; within 5 years, Fair Value		100,000
After 5 years; within 10 years, Fair Value		0
After 10 years, Fair Value		7,655,000
Subtotal, Fair Value		10,701,000
Securities available for sale, Amortized Cost		3,621,952,000	[1]		$ 3,527,756,000	[2]
Securities available for sale		3,673,641,000	[1]	$ 3,556,613,000	3,534,671,000	[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		4,313,000
HTM Subtotal, Amortized Cost		4,313,000
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		5,404,000
HTM Subtotal, Fair Value		5,404,000
Securities held to maturity, Amortized cost		4,313,000		$ 4,292,000	4,286,000
Securities held to maturity, Fair Value		5,404,000			5,380,000
Government Agency Issued MBS And CMO
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost	[3]	3,429,240,000
Securities available for sale	[3]	3,481,387,000
Securities held to maturity, Amortized cost	[3]	0
Securities held to maturity, Fair Value	[3]	0
Equity and other
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost		182,014,000	[4]		182,119,000	[5]
Securities available for sale		181,553,000	[4]		$ 181,887,000	[5]
Securities held to maturity, Amortized cost		0
Securities held to maturity, Fair Value		$ 0

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

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

[3] Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

[4] Includes restricted investments in FHLB-Cincinnati stock of $ 87.9 million and FRB stock of $ 65.8 million. The remainder is money market , mutual funds, and cost method investments.

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