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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance	$ 84,692	$ 86,670	$ 85,391	$ 92,968
Charge-offs	(4,604)	(11,602)	(13,329)	(24,293)
Recoveries	2,755	1,912	3,793	5,138
Provision	2,993	6,638	9,981	9,805
Balance, end of period, Allowance	85,836	83,618	85,836	83,618
Collectively evaluated for impairment, Allowance	83,972	83,142	83,972	83,142
Individually evaluated for impairment, Allowance	1,864	476	1,864	476
Total, Allowance for non-covered loans and leases	85,836	83,618	85,836	83,618
Collectively evaluated for impairment, Non-covered loans and leases	6,670,554	5,976,422	6,670,554	5,976,422
Individually evaluated for impairment, Non-covered loans and leases	127,336	140,308	127,336	140,308
Total, Non-covered loans and leases	6,797,890	6,116,730	6,797,890	6,116,730	6,693,603
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance	55,095	58,026	54,909	59,574
Charge-offs	(2,038)	(7,342)	(3,492)	(13,114)
Recoveries	1,480	352	1,950	1,307
Provision	712	5,305	1,882	8,574
Balance, end of period, Allowance	55,249	56,341	55,249	56,341
Collectively evaluated for impairment, Allowance	53,400	55,868	53,400	55,868
Individually evaluated for impairment, Allowance	1,849	473	1,849	473
Total, Allowance for non-covered loans and leases	55,249	56,341	55,249	56,341
Collectively evaluated for impairment, Non-covered loans and leases	4,112,263	3,782,259	4,112,263	3,782,259
Individually evaluated for impairment, Non-covered loans and leases	111,814	119,860	111,814	119,860
Total, Non-covered loans and leases	4,224,077	3,902,119	4,224,077	3,902,119
Commercial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance	21,661	17,886	22,925	20,485
Charge-offs	(1,614)	(3,115)	(7,788)	(6,958)
Recoveries	1,086	1,388	1,453	3,448
Provision	454	3,428	4,997	2,612
Balance, end of period, Allowance	21,587	19,587	21,587	19,587
Collectively evaluated for impairment, Allowance	21,583	19,587	21,583	19,587
Individually evaluated for impairment, Allowance	4	0	4	0
Total, Allowance for non-covered loans and leases	21,587	19,587	21,587	19,587
Collectively evaluated for impairment, Non-covered loans and leases	1,749,697	1,523,403	1,749,697	1,523,403
Individually evaluated for impairment, Non-covered loans and leases	15,045	19,529	15,045	19,529
Total, Non-covered loans and leases	1,764,742	1,542,932	1,764,742	1,542,932
Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance	7,219	6,106	6,925	7,625
Charge-offs	(728)	(925)	(1,632)	(3,513)
Recoveries	87	72	179	167
Provision	1,672	1,399	2,778	2,373
Balance, end of period, Allowance	8,250	6,652	8,250	6,652
Collectively evaluated for impairment, Allowance	8,239	6,649	8,239	6,649
Individually evaluated for impairment, Allowance	11	3	11	3
Total, Allowance for non-covered loans and leases	8,250	6,652	8,250	6,652
Collectively evaluated for impairment, Non-covered loans and leases	766,578	638,324	766,578	638,324
Individually evaluated for impairment, Non-covered loans and leases	477	919	477	919
Total, Non-covered loans and leases	767,055	639,243	767,055	639,243
Consumer & Other [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance	717	862	632	867
Charge-offs	(224)	(220)	(417)	(708)
Recoveries	102	100	211	216
Provision	155	296	324	663
Balance, end of period, Allowance	750	1,038	750	1,038
Collectively evaluated for impairment, Allowance	750	1,038	750	1,038
Individually evaluated for impairment, Allowance	0	0	0	0
Total, Allowance for non-covered loans and leases	750	1,038	750	1,038
Collectively evaluated for impairment, Non-covered loans and leases	42,016	32,436	42,016	32,436
Individually evaluated for impairment, Non-covered loans and leases	0	0	0	0
Total, Non-covered loans and leases	42,016	32,436	42,016	32,436
Unallocated [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance	0	3,790	0	4,417
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	0	(3,790)	0	(4,417)
Balance, end of period, Allowance	0	0	0	0
Collectively evaluated for impairment, Allowance	0	0	0	0
Individually evaluated for impairment, Allowance	0	0	0	0
Total, Allowance for non-covered loans and leases	$ 0	$ 0	$ 0	$ 0