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		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	$ 83,618	$ 97,795	$ 92,968	$ 101,921
Charge-offs	(7,644)	(16,453)	(31,937)	(55,939)
Recoveries	1,707	2,501	6,845	7,372
Provision	7,078	9,089	16,883	39,578
Balance, end of period, Allowance	84,759	92,932	84,759	92,932
Collectively evaluated for impairment, Allowance	83,621	91,851	83,621	91,851
Individually evaluated for impairment, Allowance	1,138	1,081	1,138	1,081
Collectively evaluated for impairment, Non-covered loans and leases	6,111,671	5,658,918	6,111,671	5,658,918
Individually evaluated for impairment, Non-covered loans and leases	148,854	180,446	148,854	180,446
Total, Non-covered loans and leases	6,260,525	5,839,364	6,260,525	5,839,364	5,899,178
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	56,341	61,982	59,574	64,405
Charge-offs	(4,892)	(8,413)	(18,007)	(32,728)
Recoveries	1,020	2,010	2,327	5,463
Provision	2,779	5,913	11,354	24,352
Balance, end of period, Allowance	55,248	61,492	55,248	61,492
Collectively evaluated for impairment, Allowance	54,115	60,422	54,115	60,422
Individually evaluated for impairment, Allowance	1,133	1,070	1,133	1,070
Collectively evaluated for impairment, Non-covered loans and leases	3,816,106	3,670,059	3,816,106	3,670,059
Individually evaluated for impairment, Non-covered loans and leases	129,690	151,861	129,690	151,861
Total, Non-covered loans and leases	3,945,796	3,821,920	3,945,796	3,821,920
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	19,587	23,750	20,485	22,146
Charge-offs	(1,782)	(6,032)	(8,741)	(17,387)
Recoveries	409	346	3,856	1,437
Provision	2,540	1,158	5,154	13,026
Balance, end of period, Allowance	20,754	19,222	20,754	19,222
Collectively evaluated for impairment, Allowance	20,754	19,219	20,754	19,219
Individually evaluated for impairment, Allowance		3		3
Collectively evaluated for impairment, Non-covered loans and leases	1,602,735	1,400,862	1,602,735	1,400,862
Individually evaluated for impairment, Non-covered loans and leases	18,371	28,277	18,371	28,277
Total, Non-covered loans and leases	1,621,106	1,429,139	1,621,106	1,429,139
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	6,652	5,154	7,625	5,926
Charge-offs	(516)	(1,657)	(4,030)	(4,586)
Recoveries	171	54	338	175
Provision	1,381	3,141	3,755	5,177
Balance, end of period, Allowance	7,688	6,692	7,688	6,692
Collectively evaluated for impairment, Allowance	7,683	6,684	7,683	6,684
Individually evaluated for impairment, Allowance	5	8	5	8
Collectively evaluated for impairment, Non-covered loans and leases	654,956	555,864	654,956	555,864
Individually evaluated for impairment, Non-covered loans and leases	793	308	793	308
Total, Non-covered loans and leases	655,749	556,172	655,749	556,172
Consumer & Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance	1,038	868	867	803
Charge-offs	(454)	(351)	(1,159)	(1,238)
Recoveries	107	91	324	297
Provision	331	339	990	1,085
Balance, end of period, Allowance	1,022	947	1,022	947
Collectively evaluated for impairment, Allowance	1,022	947	1,022	947
Collectively evaluated for impairment, Non-covered loans and leases	37,874	32,133	37,874	32,133
Total, Non-covered loans and leases	37,874	32,133	37,874	32,133
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period, Allowance		6,041	4,417	8,641
Provision	47	(1,462)	(4,370)	(4,062)
Balance, end of period, Allowance	47	4,579	47	4,579
Collectively evaluated for impairment, Allowance	$ 47	$ 4,579	$ 47	$ 4,579