Covered Assets and FDIC Indemnification Asset (Activity in the Covered Allowance for Loan and Lease Losses) (Details) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010
Collectively evaluated for impairment	$ 92,134	$ 106,590
Financing Receivable, Individually Evaluated for Impairment	196,563	251,170
Financing Receivable, Collectively Evaluated for Impairment	5,550,676	5,486,508
Commercial Real Estate [Member]
Collectively evaluated for impairment	59,277	61,127
Financing Receivable, Individually Evaluated for Impairment	166,464	194,373
Financing Receivable, Collectively Evaluated for Impairment	3,663,034	3,783,102
Commercial [Member]
Collectively evaluated for impairment	20,812	19,836
Financing Receivable, Individually Evaluated for Impairment	29,921	52,295
Financing Receivable, Collectively Evaluated for Impairment	1,330,749	1,203,558
Residential [Member]
Collectively evaluated for impairment	5,136	9,548
Financing Receivable, Individually Evaluated for Impairment	178	4,502
Financing Receivable, Collectively Evaluated for Impairment	522,309	465,633
Consumer & Other [Member]
Collectively evaluated for impairment	868	848
Financing Receivable, Collectively Evaluated for Impairment	$ 34,584	$ 34,215