Investment Securities (Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	$ 1,426,567	$ 235,282
Less than 12 months, Unrealized Losses	(32,659)	(1,367)
12 months or longer, Fair Value	15,967	0
12 months or longer, Unrealized Losses	(157)	0
Total Fair Value	1,442,534	235,282
Total Unrealized Losses	(32,816)	(1,367)
Mortgage Backed Securities Issued By U S Government Sponsored Enterprises [Member]
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	192,747
Less than 12 months, Unrealized Losses	(4,294)
12 months or longer, Fair Value	0
12 months or longer, Unrealized Losses	0
Total Fair Value	192,747
Total Unrealized Losses	(4,294)
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Less than 12 months, Fair Value	1,233,820	235,282
Less than 12 months, Unrealized Losses	(28,365)	(1,367)
12 months or longer, Fair Value	15,967	0
12 months or longer, Unrealized Losses	(157)	0
Total Fair Value	1,249,787	235,282
Total Unrealized Losses	$ (28,522)	$ (1,367)