Loans and Allowance for Credit Losses (Details 2) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 | Dec. 31, 2013 |
Impaired Nonaccrual Loans [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | $20,099 | $21,554 | $20,099 | $21,554 |
Recorded investment with no allowance | 12,123 | 12,422 | 12,123 | 12,422 |
Recorded investment with an allowance | 596 | 2,204 | 596 | 2,204 |
Related allowance | 593 | 716 | 593 | 716 |
Average recorded investment | 13,741 | 15,363 | 16,988 | 26,006 |
Impaired Nonaccrual Loans [Member] | Construction Loans [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 10,542 | 6,787 | 10,542 | 6,787 |
Recorded investment with no allowance | 6,801 | 3,709 | 6,801 | 3,709 |
Recorded investment with an allowance | 200 | 240 | 200 | 240 |
Related allowance | 200 | 203 | 200 | 203 |
Average recorded investment | 7,492 | 5,563 | 7,918 | 7,270 |
Impaired Nonaccrual Loans [Member] | Residential Real Estate [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 3,191 | 7,692 | 3,191 | 7,692 |
Recorded investment with no allowance | 2,300 | 3,862 | 2,300 | 3,862 |
Recorded investment with an allowance | 73 | 1,304 | 73 | 1,304 |
Related allowance | 75 | 225 | 75 | 225 |
Average recorded investment | 2,604 | 5,094 | 4,014 | 10,240 |
Impaired Nonaccrual Loans [Member] | Commercial Real Estate [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 4,557 | 5,218 | 4,557 | 5,218 |
Recorded investment with no allowance | 2,756 | 4,261 | 2,756 | 4,261 |
Recorded investment with an allowance | 0 | 410 | 0 | 410 |
Related allowance | 0 | 38 | 0 | 38 |
Average recorded investment | 3,132 | 3,917 | 4,443 | 7,829 |
Impaired Nonaccrual Loans [Member] | Commercial Loan [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 1,680 | 1,801 | 1,680 | 1,801 |
Recorded investment with no allowance | 167 | 547 | 167 | 547 |
Recorded investment with an allowance | 298 | 245 | 298 | 245 |
Related allowance | 293 | 245 | 293 | 245 |
Average recorded investment | 389 | 740 | 558 | 619 |
Impaired Nonaccrual Loans [Member] | Consumer Loan [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 129 | 56 | 129 | 56 |
Recorded investment with no allowance | 99 | 43 | 99 | 43 |
Recorded investment with an allowance | 25 | 5 | 25 | 5 |
Related allowance | 25 | 5 | 25 | 5 |
Average recorded investment | 124 | 49 | 55 | 48 |
Impaired Accruing TDRs [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 25,247 | 26,088 | 25,247 | 26,088 |
Recorded investment with no allowance | 20,980 | 23,805 | 20,980 | 23,805 |
Recorded investment with an allowance | 4,267 | 2,283 | 4,267 | 2,283 |
Related allowance | 175 | 67 | 175 | 67 |
Average recorded investment | 25,107 | 27,445 | 25,320 | 38,919 |
Impaired Accruing TDRs [Member] | Construction Loans [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 3,403 | 1,620 | 3,403 | 1,620 |
Recorded investment with no allowance | 3,316 | 1,527 | 3,316 | 1,527 |
Recorded investment with an allowance | 87 | 93 | 87 | 93 |
Related allowance | 1 | 1 | 1 | 1 |
Average recorded investment | 3,404 | 1,759 | 2,301 | 14,405 |
Impaired Accruing TDRs [Member] | Residential Real Estate [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 16,226 | 14,582 | 16,226 | 14,582 |
Recorded investment with no allowance | 12,813 | 13,177 | 12,813 | 13,177 |
Recorded investment with an allowance | 3,413 | 1,405 | 3,413 | 1,405 |
Related allowance | 168 | 60 | 168 | 60 |
Average recorded investment | 16,190 | 15,387 | 16,131 | 11,101 |
Impaired Accruing TDRs [Member] | Commercial Real Estate [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 5,566 | 9,791 | 5,566 | 9,791 |
Recorded investment with no allowance | 4,799 | 9,006 | 4,799 | 9,006 |
Recorded investment with an allowance | 767 | 785 | 767 | 785 |
Related allowance | 6 | 6 | 6 | 6 |
Average recorded investment | 5,459 | 10,201 | 6,826 | 13,308 |
Impaired Accruing TDRs [Member] | Commercial Loan [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 52 | 95 | 52 | 95 |
Recorded investment with no allowance | 52 | 95 | 52 | 95 |
Recorded investment with an allowance | 0 | 0 | 0 | 0 |
Related allowance | 0 | 0 | 0 | 0 |
Average recorded investment | 54 | 98 | 62 | 105 |
Impaired Accruing TDRs [Member] | Consumer Loan [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 0 | 0 | 0 | 0 |
Recorded investment with no allowance | 0 | 0 | 0 | 0 |
Recorded investment with an allowance | 0 | 0 | 0 | 0 |
Related allowance | 0 | 0 | 0 | 0 |
Average recorded investment | 0 | 0 | 0 | 0 |
Total Impired Loans [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 45,346 | 47,642 | 45,346 | 47,642 |
Recorded investment with no allowance | 33,103 | 36,227 | 33,103 | 36,227 |
Recorded investment with an allowance | 4,863 | 4,487 | 4,863 | 4,487 |
Related allowance | 768 | 783 | 768 | 783 |
Average recorded investment | 38,848 | 42,808 | 42,308 | 64,925 |
Total Impired Loans [Member] | Construction Loans [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 13,945 | 8,407 | 13,945 | 8,407 |
Recorded investment with no allowance | 10,117 | 5,236 | 10,117 | 5,236 |
Recorded investment with an allowance | 287 | 333 | 287 | 333 |
Related allowance | 201 | 204 | 201 | 204 |
Average recorded investment | 10,896 | 7,322 | 10,219 | 21,675 |
Total Impired Loans [Member] | Residential Real Estate [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 19,417 | 22,274 | 19,417 | 22,274 |
Recorded investment with no allowance | 15,113 | 17,039 | 15,113 | 17,039 |
Recorded investment with an allowance | 3,486 | 2,709 | 3,486 | 2,709 |
Related allowance | 243 | 285 | 243 | 285 |
Average recorded investment | 18,794 | 20,481 | 20,145 | 21,341 |
Total Impired Loans [Member] | Commercial Real Estate [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 10,123 | 15,009 | 10,123 | 15,009 |
Recorded investment with no allowance | 7,555 | 13,267 | 7,555 | 13,267 |
Recorded investment with an allowance | 767 | 1,195 | 767 | 1,195 |
Related allowance | 6 | 44 | 6 | 44 |
Average recorded investment | 8,591 | 14,118 | 11,269 | 21,137 |
Total Impired Loans [Member] | Commercial Loan [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 1,732 | 1,896 | 1,732 | 1,896 |
Recorded investment with no allowance | 219 | 642 | 219 | 642 |
Recorded investment with an allowance | 298 | 245 | 298 | 245 |
Related allowance | 293 | 245 | 293 | 245 |
Average recorded investment | 443 | 838 | 620 | 724 |
Total Impired Loans [Member] | Consumer Loan [Member] | ' | ' | ' | ' |
Financing Receivable, Allowance for Credit Losses [Line Items] | ' | ' | ' | ' |
Unpaid principal balance | 129 | 56 | 129 | 56 |
Recorded investment with no allowance | 99 | 43 | 99 | 43 |
Recorded investment with an allowance | 25 | 5 | 25 | 5 |
Related allowance | 25 | 5 | 25 | 5 |
Average recorded investment | $124 | $49 | $55 | $48 |