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	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 17,057	$ 19,774
60-89 Days Past Due	11,438	15,453
Greater Than 90 Days and Accruing	6,585	10,821
Total Past Due	35,080	46,048
Nonaccrual	73,748	80,562
Current	6,151,697	5,772,568
Total, Non-covered loans and leases	6,260,525	5,899,178	5,839,364
Deferred loan fees, net	(12,100)	(11,080)	(11,300)
Total loans and leases	6,248,425	5,888,098
Term & Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	13,759	7,319
60-89 Days Past Due	6,284	11,184
Greater Than 90 Days and Accruing	667
Total Past Due	20,710	18,503
Nonaccrual	44,347	44,486
Current	3,642,027	3,495,306
Total, Non-covered loans and leases	3,707,084	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	5,129	3,348
Current	169,425	160,481
Total, Non-covered loans and leases	174,554	165,066
Residential Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due		4,171
Total Past Due		4,171
Nonaccrual	9,567	15,836
Current	54,591	70,066
Total, Non-covered loans and leases	64,158	90,073
Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,085	2,075
60-89 Days Past Due	2,666	738
Greater Than 90 Days and Accruing		1,179
Total Past Due	3,751	3,992
Nonaccrual	9,066	8,120
Current	742,438	613,654
Total, Non-covered loans and leases	755,255	625,766
LOC & Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	185	5,435
60-89 Days Past Due	1,603	1,697
Greater Than 90 Days and Accruing		1,397
Total Past Due	1,788	8,529
Nonaccrual	4,973	8,772
Current	859,090	815,698
Total, Non-covered loans and leases	865,851	832,999
Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,264	215
60-89 Days Past Due	315	965
Greater Than 90 Days and Accruing	4,138	4,343
Total Past Due	5,717	5,523
Current	385,653	310,404
Total, Non-covered loans and leases	391,370	315,927
Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	712	492
60-89 Days Past Due	548	191
Greater Than 90 Days and Accruing	1,186	2,648
Total Past Due	2,446	3,331
Nonaccrual	666
Current	261,267	268,861
Total, Non-covered loans and leases	264,379	272,192
Consumer & Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	52	67
60-89 Days Past Due	22	16
Greater Than 90 Days and Accruing	594	679
Total Past Due	668	762
Current	37,206	38,098
Total, Non-covered loans and leases	$ 37,874	$ 38,860