Investment Securities (Schedule Of Maturities Of Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Investment Holdings [Line Items]
Available-for-sale Securities, Three months or less, Amortized Cost	$ 16,890
Available-for-sale Securities, Over three months through twelve months, Amortized Cost	242,894
Available-for-sale Securities, After one year through five years, Amortized Cost	1,347,825
Available-for-sale Securities, After five years through ten years, Amortized Cost	382,779
Available-for-sale Securities, After ten years, Amortized Cost	91,879
Available-for-sale Securities, Amortized Cost	2,084,226
Available-for-sale Securities, Three months or less, Fair Value	16,967
Available-for-sale Securities, Over three months through twelve months, Fair Value	244,765
Available-for-sale Securities, After one year through five years, Fair Value	1,353,712
Available-for-sale Securities, After five years through ten years, Fair Value	376,209
Available-for-sale Securities, After ten years, Fair Value	90,098
Available-for-sale Securities, Fair Value	2,083,755
Held-to-maturity Securities, Three months or less, Amortized Cost	0
Held-to-maturity Securities, Over three months through twelve months, Amortized Cost	0
Held-to-maturity Securities, After one year through five years, Amortized Cost	63
Held-to-maturity Securities, After five years through ten years, Amortized Cost	23
Held-to-maturity Securities, After ten years, Amortized Cost	3,655
Held-to-maturity Securities, Amortized Cost	3,741
Held-to-maturity Securities, Three months or less, Fair Value	0
Held-to-maturity Securities, Over three months through twelve months, Fair Value	0
Held-to-maturity Securities, After one year through five years, Fair Value	66
Held-to-maturity Securities, After five years through ten years, Fair Value	24
Held-to-maturity Securities, After ten years, Fair Value	3,800
Held-to-maturity Securities, Fair Value	3,890
Other Investments Securities [Member]
Investment Holdings [Line Items]
Available-for-sale Securities, Amortized Cost	1,959
Available-for-sale Securities, Fair Value	2,004
Held-to-maturity Securities, Amortized Cost	0
Held-to-maturity Securities, Fair Value	$ 0