Allowance For Non-Covered Loan Loss And Credit Quality (Activity In The Non-Covered Allowance For Loan And Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	$ 86,670	$ 97,833	$ 92,968	$ 101,921
Charge-offs	(11,602)	(18,611)	(24,293)	(39,486)
Recoveries	1,912	3,114	5,138	4,871
Provision	6,638	15,459	9,805	30,489
Balance, end of period, Allowance	83,618	97,795	83,618	97,795
Collectively evaluated for impairment, Allowance	83,142	92,134	83,142	92,134
Individually evaluated for impairment, Allowance	476	5,661	476	5,661
Collectively evaluated for impairment, Non-covered loans and leases	5,976,422	5,550,676	5,976,422	5,550,676
Individually evaluated for impairment, Non-covered loans and leases	140,308	196,563	140,308	196,563
Total Non-covered loans and Leases	6,116,730	5,747,239	6,116,730	5,747,239	5,899,178
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	58,026	63,528	59,574	64,405
Charge-offs	(7,342)	(12,883)	(13,114)	(24,314)
Recoveries	352	2,208	1,307	3,453
Provision	5,305	9,129	8,574	18,438
Balance, end of period, Allowance	56,341	61,982	56,341	61,982
Collectively evaluated for impairment, Allowance	55,868	59,277	55,868	59,277
Individually evaluated for impairment, Allowance	473	2,705	473	2,705
Collectively evaluated for impairment, Non-covered loans and leases	3,782,259	3,663,034	3,782,259	3,663,034
Individually evaluated for impairment, Non-covered loans and leases	119,860	166,464	119,860	166,464
Total Non-covered loans and Leases	3,902,119	3,829,498	3,902,119	3,829,498
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	17,886	20,798	20,485	22,146
Charge-offs	(3,115)	(3,179)	(6,958)	(11,355)
Recoveries	1,388	695	3,448	1,091
Provision	3,428	5,436	2,612	11,868
Balance, end of period, Allowance	19,587	23,750	19,587	23,750
Collectively evaluated for impairment, Allowance	19,587	20,812	19,587	20,812
Individually evaluated for impairment, Allowance		2,938		2,938
Collectively evaluated for impairment, Non-covered loans and leases	1,523,403	1,330,749	1,523,403	1,330,749
Individually evaluated for impairment, Non-covered loans and leases	19,529	29,921	19,529	29,921
Total Non-covered loans and Leases	1,542,932	1,360,670	1,542,932	1,360,670
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	6,106	5,626	7,625	5,926
Charge-offs	(925)	(2,195)	(3,513)	(2,929)
Recoveries	72	100	167	121
Provision	1,399	1,623	2,373	2,036
Balance, end of period, Allowance	6,652	5,154	6,652	5,154
Collectively evaluated for impairment, Allowance	6,649	5,136	6,649	5,136
Individually evaluated for impairment, Allowance	3	18	3	18
Collectively evaluated for impairment, Non-covered loans and leases	638,324	522,309	638,324	522,309
Individually evaluated for impairment, Non-covered loans and leases	919	178	919	178
Total Non-covered loans and Leases	639,243	522,487	639,243	522,487
Consumer & Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	862	856	867	803
Charge-offs	(220)	(354)	(708)	(888)
Recoveries	100	111	216	206
Provision	296	255	663	747
Balance, end of period, Allowance	1,038	868	1,038	868
Collectively evaluated for impairment, Allowance	1,038	868	1,038	868
Collectively evaluated for impairment, Non-covered loans and leases	32,436	34,584	32,436	34,584
Total Non-covered loans and Leases	32,436	34,584	32,436	34,584
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	3,790	7,025	4,417	8,641
Provision	(3,790)	(984)	(4,417)	(2,600)
Balance, end of period, Allowance		6,041		6,041
Collectively evaluated for impairment, Allowance		$ 6,041		$ 6,041