Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	$ 2,165,285				$ 2,133,120
Unpaid principal balance	1,033,523				1,109,953
Recorded investment	848,082				924,553
Impaired Financing Receivable, Related Allowance	60,592				66,206
Average recorded investment	907,227		1,363,323
Interest income recognized	26,545		29,802
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	201,765				178,281
Recorded investment	177,143				156,784
Impaired Financing Receivable, Related Allowance	31,319				23,687
Average recorded investment	175,155		177,745
Interest income recognized	1,024		856
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	146,504				151,499
Recorded investment	130,716				138,945
Impaired Financing Receivable, Related Allowance	8,487				13,900
Average recorded investment	137,175		182,825
Interest income recognized	752		806
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	348,269				329,780
Recorded investment	307,859				295,729
Impaired Financing Receivable, Related Allowance	39,806				37,587
Average recorded investment	312,330		360,570
Interest income recognized	1,776		1,662
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	70,088				85,440
Recorded investment	59,140				69,950
Impaired Financing Receivable, Related Allowance	2,865				3,483
Average recorded investment	62,548		147,225
Interest income recognized	552		664
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	175,713				171,826
Recorded investment	132,239				146,588
Impaired Financing Receivable, Related Allowance	3,634				7,981
Average recorded investment	149,425		289,103
Interest income recognized	1,294		1,836
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	245,801				257,266
Recorded investment	191,379				216,538
Impaired Financing Receivable, Related Allowance	6,499				11,464
Average recorded investment	211,973		436,328
Interest income recognized	1,846		2,500
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	18,145				17,547
Recorded investment	15,272				14,768
Impaired Financing Receivable, Related Allowance	67				178
Average recorded investment	14,952		11,455
Interest income recognized	135		59
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,165,285				2,133,120
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	94,639				95,613
Recorded investment	79,430				80,907
Impaired Financing Receivable, Related Allowance	9,790				10,276
Average recorded investment	80,154		99,191
Interest income recognized	448		382
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	4,241				4,713
Recorded investment	3,327				3,576
Impaired Financing Receivable, Related Allowance	179				175
Average recorded investment	3,332		6,122
Interest income recognized	35		46
Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance					726
Recorded investment					726
Impaired Financing Receivable, Related Allowance					0
Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	630				0
Recorded investment	630				0
Impaired Financing Receivable, Related Allowance	0				0
Average recorded investment	704		1,816
Interest income recognized	0		0
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	117,655				118,599
Recorded investment	98,659				99,977
Impaired Financing Receivable, Related Allowance	10,036				10,629
Average recorded investment	99,142		118,584
Interest income recognized	618		487
Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	321,798				404,308
Recorded investment	250,185				312,309
Impaired Financing Receivable, Related Allowance	4,251				6,526
Average recorded investment	283,782		447,841
Interest income recognized	22,305	[1]	25,153	[1]
Impaired Financing Receivable Related Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	506,474				652,007
Impaired Financing Receivable Related Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	140,988				126,692
Impaired Financing Receivable Related Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	71,281				88,584
Impaired Financing Receivable Related Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	212,269				215,276
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	30,460				50,744
Impaired Financing Receivable Related Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	62,043				112,330
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	92,503				163,074
Impaired Financing Receivable Related Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	2,177				2,200
Impaired Financing Receivable Related Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	39,841				42,132
Impaired Financing Receivable Related Allowance [Member] | Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	986				933
Impaired Financing Receivable Related Allowance [Member] | Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment					0
Impaired Financing Receivable Related Allowance [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	0				0
Impaired Financing Receivable Related Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	43,004				45,265
Impaired Financing Receivable Related Allowance [Member] | Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	158,698				228,392
Impaired Financing Receivable Recorded Investment With No Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	341,608				272,546
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	36,155				30,092
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	59,435				50,361
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	95,590				80,453
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	28,680				19,206
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	70,196				34,258
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	98,876				53,464
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	13,095				12,568
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	39,589				38,775
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	2,341				2,643
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Revolving Credit Facility [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment					726
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	630				0
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	55,655				54,712
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	91,487				83,917
Nonaccruing [Member] | Home Equity Credit Line [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity					$ 1,257

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