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Bank subsidiary (Details 8) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Credit risk profile based on nonaccrual loans
Nonaccrual loans	$ 66,637	$ 58,855
Accruing loans 90 days or more past due	445	965
Residential 1-4 family
Credit risk profile based on nonaccrual loans
Nonaccrual loans	33,580	36,420
Commercial real estate
Credit risk profile based on nonaccrual loans
Nonaccrual loans	3,448
Home equity line of credit
Credit risk profile based on nonaccrual loans
Nonaccrual loans	2,205	1,659
Residential land
Credit risk profile based on nonaccrual loans
Nonaccrual loans	15,644	15,479
Accruing loans 90 days or more past due		581
Commercial loans
Credit risk profile based on nonaccrual loans
Nonaccrual loans	11,541	4,956
Accruing loans 90 days or more past due	109	64
Consumer loans
Credit risk profile based on nonaccrual loans
Nonaccrual loans	219	341
Accruing loans 90 days or more past due	$ 336	$ 320

X

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524

-Subparagraph (d)

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524

-Subparagraph (d)

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration