Allowance For Non-Covered Loan Loss And Credit Quality (Non-Covered Non-Accrual Loans And Loans Past Due) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 15,563	$ 19,774
60-89 Days Past Due	8,659	15,453
Greater Than 90 Days and Accruing	8,073	10,821
Total Past Due	32,295	46,048
Nonaccrual	81,897	80,562
Current	6,002,538	5,772,568
Total Non-covered loans and Leases	6,116,730	5,899,178	5,747,239
Deferred loan fees, net	(12,298)	(11,080)	(11,700)
Total loans and leases	6,104,432	5,888,098
Term & Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	10,123	7,319
60-89 Days Past Due	1,873	11,184
Greater Than 90 Days and Accruing	4,268
Total Past Due	16,264	18,503
Nonaccrual	47,082	44,486
Current	3,596,725	3,495,306
Total Non-covered loans and Leases	3,660,071	3,558,295
Construction & Development[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
60-89 Days Past Due		662
Greater Than 90 Days and Accruing		575
Total Past Due		1,237
Nonaccrual	5,636	3,348
Current	166,346	160,481
Total Non-covered loans and Leases	171,982	165,066
Residential Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,351	4,171
Total Past Due	1,351	4,171
Nonaccrual	12,689	15,836
Current	56,026	70,066
Total Non-covered loans and Leases	70,066	90,073
Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,230	2,075
60-89 Days Past Due	2,856	738
Greater Than 90 Days and Accruing		1,179
Total Past Due	4,086	3,992
Nonaccrual	8,029	8,120
Current	695,669	613,654
Total Non-covered loans and Leases	707,784	625,766
LOC & Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	272	5,435
60-89 Days Past Due	1,598	1,697
Greater Than 90 Days and Accruing		1,397
Total Past Due	1,870	8,529
Nonaccrual	7,669	8,772
Current	825,609	815,698
Total Non-covered loans and Leases	835,148	832,999
Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,914	215
60-89 Days Past Due	1,900	965
Greater Than 90 Days and Accruing	1,813	4,343
Total Past Due	5,627	5,523
Current	369,675	310,404
Total Non-covered loans and Leases	375,302	315,927
Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	544	492
60-89 Days Past Due	264	191
Greater Than 90 Days and Accruing	1,276	2,648
Total Past Due	2,084	3,331
Nonaccrual	792
Current	261,065	268,861
Total Non-covered loans and Leases	263,941	272,192
Consumer & Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	129	67
60-89 Days Past Due	168	16
Greater Than 90 Days and Accruing	716	679
Total Past Due	1,013	762
Current	31,423	38,098
Total Non-covered loans and Leases	$ 32,436	$ 38,860