Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	$ 2,124,328				$ 2,124,328				$ 2,177,680
Unpaid principal balance	1,246,086				1,246,086				1,908,339
Recorded investment	1,041,526				1,041,526				1,325,838
Impaired Financing Receivable, Related Allowance	67,466				67,466				77,089
Average recorded investment	1,329,179		1,008,923		1,336,098		937,433
Interest income recognized	25,242		18,776		94,456		48,208
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	176,337				176,337				176,521
Recorded investment	153,681				153,681				146,815
Impaired Financing Receivable, Related Allowance	20,670				20,670				12,198
Average recorded investment	199,217		133,120		175,040		128,930
Interest income recognized	1,105		830		2,594		2,395
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	166,488				166,488				210,319
Recorded investment	153,733				153,733				185,695
Impaired Financing Receivable, Related Allowance	15,668				15,668				17,105
Average recorded investment	217,439		187,072		211,225		168,328
Interest income recognized	915		558		2,810		1,729
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	342,825				342,825				386,840
Recorded investment	307,414				307,414				332,510
Impaired Financing Receivable, Related Allowance	36,338				36,338				29,303
Average recorded investment	416,656		324,135		386,265		298,572
Interest income recognized	2,020		1,388		5,404		4,124
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	130,435				130,435				182,385
Recorded investment	113,391				113,391				153,096
Impaired Financing Receivable, Related Allowance	3,572				3,572				5,178
Average recorded investment	135,013		205,295		139,194		188,064
Interest income recognized	623		1,133		2,754		2,780
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	207,519				207,519				310,242
Recorded investment	182,347				182,347				257,830
Impaired Financing Receivable, Related Allowance	10,243				10,243				16,725
Average recorded investment	288,980		288,735		285,307		258,159
Interest income recognized	1,969		1,723		5,571		5,806
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	337,954				337,954				492,627
Recorded investment	295,738				295,738				410,926
Impaired Financing Receivable, Related Allowance	13,815				13,815				21,903
Average recorded investment	423,993		494,030		424,501		446,223
Interest income recognized	2,592		2,856		8,325		8,586
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	15,056				15,056				14,339
Recorded investment	12,244				12,244				11,499
Impaired Financing Receivable, Related Allowance	182				182				297
Average recorded investment	14,606		742		12,943		847
Interest income recognized	120		3		262		6
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	101,913				101,913				108,934
Recorded investment	86,303				86,303				92,469
Impaired Financing Receivable, Related Allowance	11,778				11,778				12,921
Average recorded investment	103,379		86,103		100,012		79,993
Interest income recognized	457		431		1,171		1,162
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	6,238				6,238				7,054
Recorded investment	4,772				4,772				5,795
Impaired Financing Receivable, Related Allowance	229				229				517
Average recorded investment	5,501		6,764		5,767		6,641
Interest income recognized	49		43		141		128
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance									287
Recorded investment									287
Impaired Financing Receivable, Related Allowance									1
Average recorded investment	0		287		0		128
Interest income recognized	0		0		0		0
Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	753				753				2,454
Recorded investment	753				753				2,007
Impaired Financing Receivable, Related Allowance	0				0				22
Average recorded investment	1,751		1,972		1,784		2,320
Interest income recognized	0		0		0		0
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	123,960				123,960				133,068
Recorded investment	104,072				104,072				112,057
Impaired Financing Receivable, Related Allowance	12,189				12,189				13,758
Average recorded investment	125,237		95,868		120,506		89,929
Interest income recognized	626		477		1,574		1,296
Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	441,347				441,347				895,804
Recorded investment	334,302				334,302				470,345
Impaired Financing Receivable, Related Allowance	5,124				5,124				12,125
Average recorded investment	363,293		94,890		404,826		102,709
Interest income recognized	20,004	[1]	14,055	[1]	79,153	[1]	34,202	[1]
Impaired Financing Receivable Related Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	689,878				689,878				751,045
Impaired Financing Receivable Related Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	124,439				124,439				119,780
Impaired Financing Receivable Related Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	102,850				102,850				106,282
Impaired Financing Receivable Related Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	227,289				227,289				226,062
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	64,479				64,479				85,855
Impaired Financing Receivable Related Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	134,593				134,593				187,112
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	199,072				199,072				272,967
Impaired Financing Receivable Related Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	2,464				2,464				3,444
Impaired Financing Receivable Related Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	46,529				46,529				49,867
Impaired Financing Receivable Related Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	1,603				1,603				3,085
Impaired Financing Receivable Related Allowance [Member] | Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment									287
Impaired Financing Receivable Related Allowance [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	0				0				175
Impaired Financing Receivable Related Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	50,596				50,596				56,858
Impaired Financing Receivable Related Allowance [Member] | Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	212,921				212,921				195,158
Impaired Financing Receivable Recorded Investment With No Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	351,648				351,648				574,793
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	29,242				29,242				27,035
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	50,883				50,883				79,413
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	80,125				80,125				106,448
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	48,912				48,912				67,241
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	47,754				47,754				70,718
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	96,666				96,666				137,959
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	9,780				9,780				8,055
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	39,774				39,774				42,602
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	3,169				3,169				2,710
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment									0
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	753				753				1,832
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	53,476				53,476				55,199
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	121,381				121,381				275,187
Nonaccruing [Member] | Home Equity Credit Line [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity									$ 4,282

[1] The balance of interest income recognized results primarily from accretion of interest income on impaired FDIC-supported loans.