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Bank subsidiary (Details 6) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 | Dec. 31, 2011
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | $ 37,906 | $ 40,646
Charge-offs | (5,884) | (19,490)
Recoveries | 1,517 | 1,741
Provision | 5,924 | 15,009
Valuation allowance, balance at the end of the period | 39,463 | 37,906
Ending balance: individually evaluated for impairment | 3,089 | 3,704
Ending balance: collectively evaluated for impairment | 36,374 | 34,202
Financing Receivables: |  |
Ending balance | 3,747,338 | 3,694,535
Ending balance: individually evaluated for impairment | 123,871 | 128,488
Ending balance: collectively evaluated for impairment | 3,623,467 | 3,566,047
Residential 1-4 family |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 6,500 | 6,497
Charge-offs | (1,512) | (5,528)
Recoveries | 595 | 110
Provision | 1,629 | 5,421
Valuation allowance, balance at the end of the period | 7,212 | 6,500
Ending balance: individually evaluated for impairment | 324 | 203
Ending balance: collectively evaluated for impairment | 6,888 | 6,297
Financing Receivables: |  |
Ending balance | 1,893,456 | 1,926,774
Ending balance: individually evaluated for impairment | 30,132 | 26,012
Ending balance: collectively evaluated for impairment | 1,863,324 | 1,900,762
Commercial real estate |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 1,688 | 1,474
Provision | 390 | 214
Valuation allowance, balance at the end of the period | 2,078 | 1,688
Ending balance: collectively evaluated for impairment | 2,078 | 1,688
Financing Receivables: |  |
Ending balance | 372,616 | 331,931
Ending balance: individually evaluated for impairment | 12,938 | 13,397
Ending balance: collectively evaluated for impairment | 359,678 | 318,534
Home equity line of credit |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 4,354 | 4,269
Charge-offs | (39) | (1,439)
Recoveries | 88 | 25
Provision | 440 | 1,499
Valuation allowance, balance at the end of the period | 4,843 | 4,354
Ending balance: collectively evaluated for impairment | 4,843 | 4,354
Financing Receivables: |  |
Ending balance | 589,852 | 535,481
Ending balance: individually evaluated for impairment | 1,838 | 1,450
Ending balance: collectively evaluated for impairment | 588,014 | 534,031
Residential land |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 3,795 | 6,411
Charge-offs | (1,247) | (4,071)
Recoveries | 245 | 170
Provision | 547 | 1,285
Valuation allowance, balance at the end of the period | 3,340 | 3,795
Ending balance: individually evaluated for impairment | 2,322 | 2,525
Ending balance: collectively evaluated for impairment | 1,018 | 1,270
Financing Receivables: |  |
Ending balance | 34,200 | 45,392
Ending balance: individually evaluated for impairment | 29,855 | 39,364
Ending balance: collectively evaluated for impairment | 4,345 | 6,028
Commercial construction |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 1,888 | 1,714
Provision | 367 | 174
Valuation allowance, balance at the end of the period | 2,255 | 1,888
Ending balance: collectively evaluated for impairment | 2,255 | 1,888
Financing Receivables: |  |
Ending balance | 50,120 | 41,950
Ending balance: collectively evaluated for impairment | 50,120 | 41,950
Residential construction |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 4 | 7
Provision | (1) | (3)
Valuation allowance, balance at the end of the period | 3 | 4
Ending balance: collectively evaluated for impairment | 3 | 4
Financing Receivables: |  |
Ending balance | 1,797 | 3,327
Ending balance: collectively evaluated for impairment | 1,797 | 3,327
Commercial loans |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 14,867 | 16,015
Charge-offs | (1,834) | (5,335)
Recoveries | 356 | 869
Provision | 572 | 3,318
Valuation allowance, balance at the end of the period | 13,961 | 14,867
Ending balance: individually evaluated for impairment | 443 | 976
Ending balance: collectively evaluated for impairment | 13,518 | 13,891
Financing Receivables: |  |
Ending balance | 704,255 | 716,427
Ending balance: individually evaluated for impairment | 49,085 | 48,241
Ending balance: collectively evaluated for impairment | 655,170 | 668,186
Consumer loans |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 3,806 | 3,325
Charge-offs | (1,252) | (3,117)
Recoveries | 233 | 567
Provision | 1,010 | 3,031
Valuation allowance, balance at the end of the period | 3,797 | 3,806
Ending balance: collectively evaluated for impairment | 3,797 | 3,806
Financing Receivables: |  |
Ending balance | 101,042 | 93,253
Ending balance: individually evaluated for impairment | 23 | 24
Ending balance: collectively evaluated for impairment | 101,019 | 93,229
Unallocated |  |
Allowance for loan losses: |  |
Valuation allowance, balance at the beginning of the period | 1,004 | 934
Provision | 970 | 70
Valuation allowance, balance at the end of the period | 1,974 | 1,004
Ending balance: collectively evaluated for impairment | $ 1,974 | $ 1,004

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- Definition The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Receivable -URI http://asc.fasb.org/extlink&oid=6953735 + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(1) + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (g) + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (g) + Details
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- Definition Charge to expense for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(2) + Details
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- Definition Reduction to the allowance for credit losses related to collections on financing receivables which have been partially or fully charged off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(4) + Details
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- Definition Reduction to the allowance for credit losses related to financing receivables deemed uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(3) + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (h) + Details
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