Derivatives (Derivatives Associated with Capital Markets Trading Activities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Customer Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 1,706,209	$ 1,502,164
Assets	88,851	130,705
Liabilities	8,925	1,498
Offsetting Upstream Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional	1,706,209	1,502,164
Assets	8,925	1,498
Liabilities	88,851	130,705
Put Option [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional, Option Contracts	40,000
Assets, Option Contracts	36
Liabilities, Option Contracts	0
Forwards And Futures Purchased [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional, Forwards and Futures	3,726,645	3,085,323
Assets, Forwards and Futures	21,109	1,001
Liabilities, Forwards and Futures	6,573	2,553
Forwards And Futures Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional, Forwards and Futures	4,159,652	3,444,049
Assets, Forwards and Futures	5,201	2,810
Liabilities, Forwards and Futures	27,995	3,786
Call Option
Derivative Instruments, Gain (Loss) [Line Items]
Notional, Option Contracts	2,500
Assets, Option Contracts	0
Liabilities, Option Contracts	$ 6