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Schedule V Valuation and Qualifying Accounts (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Allowance for Loan and Lease Losses, Real Estate [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Valuation Allowances and Reserves, Balance, Beginning Balance | $ 11,800,000 | $ 6,200,000 | $ 5,800,000
Valuation Allowances and Reserves, Charged to Cost and Expense | 6,300,000 | 9,500,000 | 7,400,000
Valuation Allowances and Reserves, Charged to Other Accounts | 0 | 0 | 0
Valuation Allowances and Reserves, Deductions | 6,500,000 | 3,900,000 | 7,000,000
Valuation Allowances and Reserves, Balance, Ending Balance | 11,600,000 | 11,800,000 | 6,200,000
Valuation Allowance of Deferred Tax Assets [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Valuation Allowances and Reserves, Balance, Beginning Balance | 8,600,000 | 3,900,000 | 3,500,000
Valuation Allowances and Reserves, Charged to Cost and Expense | 0 | 0 | 0
Valuation Allowances and Reserves, Charged to Other Accounts | 1,600,000 | 5,400,000 | 3,200,000
Valuation Allowances and Reserves, Deductions | 100,000 | 700,000 | 2,800,000
Valuation Allowances and Reserves, Balance, Ending Balance | $ 10,100,000 | $ 8,600,000 | $ 3,900,000

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to accounts other than costs and expenses in a given period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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