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Loans and allowance for credit losses (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2014 Impaired Nonaccrual Loans [Member] | Jun. 30, 2013 Impaired Nonaccrual Loans [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Construction Loans [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Construction Loans [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Construction Loans [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Construction Loans [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Residential Real Estate [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Residential Real Estate [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Residential Real Estate [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Residential Real Estate [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Commercial Real Estate [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Commercial Real Estate [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Commercial Real Estate [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Commercial Real Estate [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Commercial Loan [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Commercial Loan [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Commercial Loan [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Commercial Loan [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Consumer Loan [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Consumer Loan [Member] | Jun. 30, 2014 Impaired Nonaccrual Loans [Member] Consumer Loan [Member] | Dec. 31, 2013 Impaired Nonaccrual Loans [Member] Consumer Loan [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Construction Loans [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Construction Loans [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Construction Loans [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Construction Loans [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Residential Real Estate [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Residential Real Estate [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Residential Real Estate [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Residential Real Estate [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Commercial Real Estate [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Commercial Real Estate [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Commercial Real Estate [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Commercial Real Estate [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Commercial Loan [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Commercial Loan [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Commercial Loan [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Commercial Loan [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Consumer Loan [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Consumer Loan [Member] | Jun. 30, 2014 Impaired Accruing TDRs [Member] Consumer Loan [Member] | Dec. 31, 2013 Impaired Accruing TDRs [Member] Consumer Loan [Member] | Jun. 30, 2014 Total Impired Loans [Member] | Dec. 31, 2013 Total Impired Loans [Member] | Jun. 30, 2014 Total Impired Loans [Member] | Dec. 31, 2013 Total Impired Loans [Member] | Jun. 30, 2014 Total Impired Loans [Member] Construction Loans [Member] | Dec. 31, 2013 Total Impired Loans [Member] Construction Loans [Member] | Jun. 30, 2014 Total Impired Loans [Member] Construction Loans [Member] | Dec. 31, 2013 Total Impired Loans [Member] Construction Loans [Member] | Jun. 30, 2014 Total Impired Loans [Member] Residential Real Estate [Member] | Dec. 31, 2013 Total Impired Loans [Member] Residential Real Estate [Member] | Jun. 30, 2014 Total Impired Loans [Member] Residential Real Estate [Member] | Dec. 31, 2013 Total Impired Loans [Member] Residential Real Estate [Member] | Jun. 30, 2014 Total Impired Loans [Member] Commercial Real Estate [Member] | Dec. 31, 2013 Total Impired Loans [Member] Commercial Real Estate [Member] | Jun. 30, 2014 Total Impired Loans [Member] Commercial Real Estate [Member] | Dec. 31, 2013 Total Impired Loans [Member] Commercial Real Estate [Member] | Jun. 30, 2014 Total Impired Loans [Member] Commercial Loan [Member] | Dec. 31, 2013 Total Impired Loans [Member] Commercial Loan [Member] | Jun. 30, 2014 Total Impired Loans [Member] Commercial Loan [Member] | Dec. 31, 2013 Total Impired Loans [Member] Commercial Loan [Member] | Jun. 30, 2014 Total Impired Loans [Member] Consumer Loan [Member] | Dec. 31, 2013 Total Impired Loans [Member] Consumer Loan [Member] | Jun. 30, 2014 Total Impired Loans [Member] Consumer Loan [Member] | Dec. 31, 2013 Total Impired Loans [Member] Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unpaid principal balance | $ 22,481 |  | $ 22,481 | $ 21,554 | $ 12,263 | $ 6,787 | $ 12,263 | $ 6,787 | $ 3,915 | $ 7,692 | $ 3,915 | $ 7,692 | $ 5,801 | $ 5,218 | $ 5,801 | $ 5,218 | $ 472 | $ 1,801 | $ 472 | $ 1,801 | $ 30 | $ 56 | $ 30 | $ 56 | $ 25,402 | $ 26,088 | $ 25,402 | $ 26,088 | $ 3,898 | $ 1,620 | $ 3,898 | $ 1,620 | $ 16,195 | $ 14,582 | $ 16,195 | $ 14,582 | $ 5,253 | $ 9,791 | $ 5,253 | $ 9,791 | $ 56 | $ 95 | $ 56 | $ 95 | $ 0 | $ 0 | $ 0 | $ 0 | $ 47,883 | $ 47,642 | $ 47,883 | $ 47,642 | $ 16,161 | $ 8,407 | $ 16,161 | $ 8,407 | $ 20,110 | $ 22,274 | $ 20,110 | $ 22,274 | $ 11,054 | $ 15,009 | $ 11,054 | $ 15,009 | $ 528 | $ 1,896 | $ 528 | $ 1,896 | $ 30 | $ 56 | $ 30 | $ 56
Recorded investment with no allowance | 13,683 |  | 13,683 | 12,422 | 7,780 | 3,709 | 7,780 | 3,709 | 2,780 | 3,862 | 2,780 | 3,862 | 2,927 | 4,261 | 2,927 | 4,261 | 196 | 547 | 196 | 547 | 0 | 43 | 0 | 43 | 21,106 | 23,805 | 21,106 | 23,805 | 3,809 | 1,527 | 3,809 | 1,527 | 12,761 | 13,177 | 12,761 | 13,177 | 4,480 | 9,006 | 4,480 | 9,006 | 56 | 95 | 56 | 95 | 0 | 0 | 0 | 0 | 34,789 | 36,227 | 34,789 | 36,227 | 11,589 | 5,236 | 11,589 | 5,236 | 15,541 | 17,039 | 15,541 | 17,039 | 7,407 | 13,267 | 7,407 | 13,267 | 252 | 642 | 252 | 642 | 0 | 43 | 0 | 43
Recorded investment with an allowance | 1,493 |  | 1,493 | 2,204 | 200 | 240 | 200 | 240 | 257 | 1,304 | 257 | 1,304 | 946 | 410 | 946 | 410 | 65 | 245 | 65 | 245 | 25 | 5 | 25 | 5 | 4,296 | 2,283 | 4,296 | 2,283 | 89 | 93 | 89 | 93 | 3,434 | 1,405 | 3,434 | 1,405 | 773 | 785 | 773 | 785 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5,789 | 4,487 | 5,789 | 4,487 | 289 | 333 | 289 | 333 | 3,691 | 2,709 | 3,691 | 2,709 | 1,719 | 1,195 | 1,719 | 1,195 | 65 | 245 | 65 | 245 | 25 | 5 | 25 | 5
Related allowance | 433 |  | 433 | 716 | 200 | 203 | 200 | 203 | 125 | 225 | 125 | 225 | 18 | 38 | 18 | 38 | 65 | 245 | 65 | 245 | 25 | 5 | 25 | 5 | 192 | 67 | 192 | 67 | 1 | 1 | 1 | 1 | 185 | 60 | 185 | 60 | 6 | 6 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 625 | 783 | 625 | 783 | 201 | 204 | 201 | 204 | 310 | 285 | 310 | 285 | 24 | 44 | 24 | 44 | 65 | 245 | 65 | 245 | 25 | 5 | 25 | 5
Average recorded investment | $ 16,999 | $ 15,363 | $ 18,611 | $ 26,006 | $ 8,040 | $ 5,563 | $ 8,131 | $ 7,270 | $ 3,299 | $ 5,094 | $ 4,719 | $ 10,240 | $ 5,034 | $ 3,917 | $ 5,098 | $ 7,829 | $ 598 | $ 740 | $ 642 | $ 619 | $ 28 | $ 49 | $ 21 | $ 48 | $ 25,319 | $ 27,445 | $ 25,426 | $ 38,919 | $ 2,157 | $ 1,759 | $ 1,749 | $ 14,405 | $ 16,080 | $ 15,387 | $ 16,102 | $ 11,101 | $ 7,023 | $ 10,201 | $ 7,509 | $ 13,308 | $ 59 | $ 98 | $ 66 | $ 105 | $ 0 | $ 0 | $ 0 | $ 0 | $ 42,318 | $ 42,808 | $ 44,037 | $ 64,925 | $ 10,197 | $ 7,322 | $ 9,880 | $ 21,675 | $ 19,379 | $ 20,481 | $ 20,821 | $ 21,341 | $ 12,057 | $ 14,118 | $ 12,607 | $ 21,137 | $ 657 | $ 838 | $ 708 | $ 724 | $ 28 | $ 49 | $ 21 | $ 48

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524 + Details
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