Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Gross, Consumer, Home Equity	$ 2,123,913				$ 2,123,913				$ 2,177,680
Unpaid principal balance	1,378,606				1,378,606				1,908,339
Recorded investment	1,118,963				1,118,963				1,325,838
Impaired Financing Receivable, Related Allowance	67,811				67,811				77,089
Average recorded investment	1,337,579		1,051,819		1,349,974		1,004,217
Interest income recognized	39,844		16,035		69,546		29,412
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	158,007				158,007				176,521
Recorded investment	130,639				130,639				146,815
Impaired Financing Receivable, Related Allowance	15,463				15,463				12,198
Average recorded investment	170,959		163,397		162,330		158,783
Interest income recognized	861		820		1,519		1,509
Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	205,569				205,569				210,319
Recorded investment	188,747				188,747				185,695
Impaired Financing Receivable, Related Allowance	19,697				19,697				17,105
Average recorded investment	213,757		196,213		209,928		179,503
Interest income recognized	959		644		1,878		1,176
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	363,576				363,576				386,840
Recorded investment	319,386				319,386				332,510
Impaired Financing Receivable, Related Allowance	35,160				35,160				29,303
Average recorded investment	384,716		359,610		372,258		338,286
Interest income recognized	1,820		1,464		3,397		2,685
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	139,255				139,255				182,385
Recorded investment	118,926				118,926				153,096
Impaired Financing Receivable, Related Allowance	4,277				4,277				5,178
Average recorded investment	142,428		218,087		145,234		207,418
Interest income recognized	1,558		1,385		2,215		2,940
Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	208,326				208,326				310,242
Recorded investment	184,473				184,473				257,830
Impaired Financing Receivable, Related Allowance	11,651				11,651				16,725
Average recorded investment	284,518		268,798		287,464		255,229
Interest income recognized	1,984		1,416		3,824		2,789
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	347,581				347,581				492,627
Recorded investment	303,399				303,399				410,926
Impaired Financing Receivable, Related Allowance	15,928				15,928				21,903
Average recorded investment	426,946		486,885		432,698		462,647
Interest income recognized	3,542		2,801		6,039		5,729
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	16,308				16,308				14,339
Recorded investment	13,519				13,519				11,499
Impaired Financing Receivable, Related Allowance	206				206				297
Average recorded investment	13,462		906		12,459		998
Interest income recognized	85		2		143		4
One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	106,014				106,014				108,934
Recorded investment	90,154				90,154				92,469
Impaired Financing Receivable, Related Allowance	11,358				11,358				12,921
Average recorded investment	100,395		93,188		98,914		86,799
Interest income recognized	354		437		725		758
Construction And Other Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	6,865				6,865				7,054
Recorded investment	5,004				5,004				5,795
Impaired Financing Receivable, Related Allowance	252				252				517
Average recorded investment	5,626		7,079		5,874		6,763
Interest income recognized	47		43		93		88
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			98				49
Interest income recognized			0				0
Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	938				938				2,454
Recorded investment	938				938				2,007
Impaired Financing Receivable, Related Allowance	0				0				22
Average recorded investment	1,782		1,550		1,799		2,105
Interest income recognized	0		0		0		0
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	130,125				130,125				133,068
Recorded investment	109,615				109,615				112,057
Impaired Financing Receivable, Related Allowance	11,816				11,816				13,758
Average recorded investment	121,265		102,821		119,046		96,714
Interest income recognized	486		482		961		850
Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	537,324				537,324				895,804
Recorded investment	386,563				386,563				470,345
Impaired Financing Receivable, Related Allowance	4,907				4,907				12,125
Average recorded investment	404,652		102,503		425,972		106,570
Interest income recognized	33,996	[1]	11,288	[1]	59,149	[1]	20,148	[1]
Impaired Financing Receivable Related Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	688,006				688,006				751,045
Impaired Financing Receivable Related Allowance [Member] | Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	102,604				102,604				119,780
Impaired Financing Receivable Related Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	132,111				132,111				106,282
Impaired Financing Receivable Related Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	234,715				234,715				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	66,717				66,717				85,855
Impaired Financing Receivable Related Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	142,290				142,290				187,112
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	209,007				209,007				272,967
Impaired Financing Receivable Related Allowance [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	2,538				2,538				3,444
Impaired Financing Receivable Related Allowance [Member] | One Through Four Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	45,926				45,926				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	1,599				1,599				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	2				2				175
Impaired Financing Receivable Related Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	50,065				50,065				56,858
Impaired Financing Receivable Related Allowance [Member] | Fdic Supported Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	194,219				194,219				195,158
Impaired Financing Receivable Recorded Investment With No Allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	430,957				430,957				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	28,035				28,035				27,035
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	56,636				56,636				79,413
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	84,671				84,671				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	52,209				52,209				67,241
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	42,183				42,183				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	94,392				94,392				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	10,981				10,981				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	44,228				44,228				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	3,405				3,405				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	936				936				1,832
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment	59,550				59,550				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	192,344				192,344				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.