Loans Held for Investment (LHFI) and Allowance for Loan Losses, excluding Covered Loans Part 5 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Dec. 31, 2009
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	$ 86,846	$ 100,656	$ 86,846	$ 100,656	$ 93,510	$ 103,662
Charge-offs			(28,637)	(34,072)
Recoveries			6,320	5,573
Net charge-offs			(22,317)	(28,499)
Provisions For Loan Losses	8,116	10,398	15,653	25,493
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	8,047	11,383	8,047	11,383
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	78,799	89,273	78,799	89,273
Allowance For Loan Losses	86,846	100,656	86,846	100,656	93,510	103,662
Number of Loan Types For Commercial Portfolio	13		13
Number of Risk Rate Factors For Commercial Loans	360		360
Number of Unique Qualitative Factors Used To Analyze Commercial Loans	8		8
The Minimum Score For Qualitative Risk Factor			0
The Maximum Score For Qualitative Risk Factor			100
Real Estate Secured Financing Receivable [Member] \| Construction Land Development And Other Financing Receivable [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	31,201	40,311	31,201	40,311	35,562	43,552
Charge-offs			(12,286)	(16,365)
Provisions For Loan Losses			7,925	13,124
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	4,207	7,150	4,207	7,150
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	26,994	33,161	26,994	33,161
Allowance For Loan Losses	31,201	40,311	31,201	40,311	35,562	43,552
Real Estate Secured Financing Receivable [Member] \| Residential Financing Receivable [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	11,842	12,632	11,842	12,632	13,051	13,151
Charge-offs			(4,819)	(5,920)
Recoveries			388	205
Provisions For Loan Losses			3,222	5,196
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	630	1,729	630	1,729
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	11,212	10,903	11,212	10,903
Allowance For Loan Losses	11,842	12,632	11,842	12,632	13,051	13,151
Real Estate Secured Financing Receivable [Member] \| Nonresidential Properties Financing Receivables [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	20,893	22,220	20,893	22,220	20,980	20,110
Charge-offs			(2,818)	(1,122)
Provisions For Loan Losses			2,731	3,232
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	1,291	838	1,291	838
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	19,602	21,382	19,602	21,382
Allowance For Loan Losses	20,893	22,220	20,893	22,220	20,980	20,110
Real Estate Secured Financing Receivable [Member] \| Other Real Estate Secured Financing Receivable [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	1,780	1,638	1,780	1,638	1,582	1,631
Charge-offs			(577)	(6)
Provisions For Loan Losses			775	13
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	45	458	45	458
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	1,735	1,180	1,735	1,180
Allowance For Loan Losses	1,780	1,638	1,780	1,638	1,582	1,631
Commercial And Industrial Loans [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	14,132	15,443	14,132	15,443	14,775	16,275
Charge-offs			(2,948)	(1,379)
Recoveries			1,159	526
Provisions For Loan Losses			1,146	21
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	1,812	1,169	1,812	1,169
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	12,320	14,274	12,320	14,274
Allowance For Loan Losses	14,132	15,443	14,132	15,443	14,775	16,275
Consumer Loans Financing Receivable [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	4,377	6,308	4,377	6,308	5,400	7,246
Charge-offs			(3,048)	(5,575)
Recoveries			3,043	3,225
Provisions For Loan Losses			(1,018)	1,412
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	12	9	12	9
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	4,365	6,299	4,365	6,299
Allowance For Loan Losses	4,377	6,308	4,377	6,308	5,400	7,246
Other Loans Financing Receivable [Member]
Financing Receivable, Allowance For Credit Losses [Abstract]
Allowance For Loan Losses	2,621	2,104	2,621	2,104	2,160	1,697
Charge-offs			(2,141)	(3,705)
Recoveries			1,730	1,617
Provisions For Loan Losses			872	2,495
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	50	30	50	30
Allowance For Loan Losses Disaggregated By Impairment Method, Individually	2,571	2,074	2,571	2,074
Allowance For Loan Losses	$ 2,621	$ 2,104	$ 2,621	$ 2,104	$ 2,160	$ 1,697

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The number of unique loan types the commercial portfolio was delineated into for analysis of loan loss allowance.

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When presenting a range of scores, the highest potential score under the assessment procedure.

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Reflects the amount charged against earnings during the period as bad debt expense, net of recoveries of previously expensed credit losses.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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The valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Reduction to the allowance for credit losses related to collections on financing receivables which have been partially or fully charged off as bad debts.

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Reduction to the allowance for credit losses related to financing receivables deemed uncollectible.

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- Definition

The allowance for loan and lease losses represents the reserve to cover probable credit losses related to specifically identified loans and leases, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for loan losses in connection with business combinations determined to be appropriate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher OTS
-Name Federal Regulation (FR)
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 114
-Paragraph 20
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Standards Codification
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The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Chapter 5
-Paragraph 168, 169, 170
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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