Investment Securities (Schedule Of Amortized Cost And Fair Value By Contractual Maturity) (Details) - USD ($) $ in Thousands		Jun. 30, 2016		Dec. 31, 2015	Jun. 30, 2015
Schedule of Investments [Line Items]
Within 1 year, Amortized Cost		$ 1,500
After 1 year; within 5 years, Amortized Cost		100
After 5 years; within 10 years, Amortized Cost		0
After 10 years, Amortized Cost		0
Subtotal, Amortized Cost		1,600
Within 1 year, Fair Value		1,500
After 1 year; within 5 years, Fair Value		100
After 5 years; within 10 years, Fair Value		0
After 10 years, Fair Value		0
Subtotal, Fair Value		1,600
Securities available for sale, Amortized Cost		3,914,243	[1]		$ 3,622,145	[2]
Securities available for sale, Fair Value		4,009,243	[1]	$ 3,929,846	3,648,860	[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		10,000
HTM, After 10 years, Amortized Cost		4,333
HTM Subtotal, Amortized Cost		14,333
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		10,361
HTM, After 10 years, Fair Value		4,740
HTM Subtotal, Fair Value		15,101
Securities held to maturity, Amortized cost		14,333		$ 14,320	4,306
Securities held to maturity, Fair Value		15,101			5,356
Government Agency Issued MBS And CMO
Schedule of Investments [Line Items]
Securities available for sale, Amortized Cost	[3]	3,726,036
Securities available for sale, Fair Value	[3]	3,821,038
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		186,607	[4]		182,059	[5]
Securities available for sale, Fair Value		186,605	[4]		$ 181,819	[5]
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 $ 3.2 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 $ 68 .6 million. The remainder is money market and cost method investments.

[5] Includes restricted investments in FHLB-Cincinnati stock of $ 87.9 million and FRB stock of $ 65 .8 million. The remainder is money market and cost method investments.