Allowance for Non-Covered Loan Loss and Credit Quality (Non-Covered Non-Accrual Loans and Loans Past Due) (Details) (USD $) In Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Total Non-covered Loans and Leases	$ 5,747,239		$ 5,737,678
Deferred loan fees, net	(11,686)	(11,031)
Non-covered loans and leases	5,735,553	5,658,987
Commercial [Member]
Total Non-covered Loans and Leases	1,360,670		1,255,853
Commercial [Member] | LOC & Other [Member]
30-59 Days Past Due	476	5,939
60-89 Days Past Due	495	1,418
Greater Than 90 Days and Accruing	5,713	18
Total Past Due	6,684	7,375
Nonaccrual	14,809	28,034
Current	766,775	712,010
Total Non-covered Loans and Leases	788,268	747,419
Commercial [Member] | Term [Member]
30-59 Days Past Due	1,548	2,010
60-89 Days Past Due	957	932
Greater Than 90 Days and Accruing	750
Total Past Due	3,255	2,942
Nonaccrual	8,070	6,271
Current	561,077	500,240
Total Non-covered Loans and Leases	572,402	509,453
Commercial Real Estate [Member]
Total Non-covered Loans and Leases	3,829,498		3,977,475
Commercial Real Estate [Member] | Residential Development [Member]
30-59 Days Past Due	2,573	640
Total Past Due	2,573	640
Nonaccrual	25,858	34,586
Current	84,226	112,587
Total Non-covered Loans and Leases	112,657	147,813
Commercial Real Estate [Member] | Construction & Development [Member]
30-59 Days Past Due	99	2,172
60-89 Days Past Due		6,726
Total Past Due	99	8,898
Nonaccrual	8,093	20,124
Current	176,515	218,792
Total Non-covered Loans and Leases	184,707	247,814
Commercial Real Estate [Member] | Term & Multifamily [Member]
30-59 Days Past Due	15,154	14,596
60-89 Days Past Due	16,940	8,328
Greater Than 90 Days and Accruing	555	3,008
Total Past Due	32,649	25,932
Nonaccrual	53,059	49,162
Current	3,446,426	3,408,381
Total Non-covered Loans and Leases	3,532,134	3,483,475
Residential [Member]
Total Non-covered Loans and Leases	522,487		470,135
Residential [Member] | Mortgage [Member]
30-59 Days Past Due	1,357	1,314
60-89 Days Past Due	908	1,101
Greater Than 90 Days and Accruing	4,467	3,372
Total Past Due	6,732	5,787
Current	238,302	216,629
Total Non-covered Loans and Leases	245,034	222,416
Residential [Member] | Home Equity Loans & Lines [Member]
30-59 Days Past Due	1,800	1,096
60-89 Days Past Due	1,277	1,351
Greater Than 90 Days and Accruing	1,123	232
Total Past Due	4,200	2,679
Current	273,253	275,906
Total Non-covered Loans and Leases	277,453	278,585
Consumer & Other [Member]
30-59 Days Past Due	207	361
60-89 Days Past Due	60	233
Greater Than 90 Days and Accruing	529	441
Total Past Due	796	1,035
Current	33,788	32,008
Total Non-covered Loans and Leases	34,584	33,043
Total Loan [Member]
30-59 Days Past Due	23,214	28,128
60-89 Days Past Due	20,637	20,089
Greater Than 90 Days and Accruing	13,137	7,071
Total Past Due	56,988	55,288
Nonaccrual	109,889	138,177
Current	5,580,362	5,476,553
Total Non-covered Loans and Leases	$ 5,747,239	$ 5,670,018