| Allowance for Credit Losses on Financing Receivables [Table Text Block] |
Activity in the allowance for loan losses was as follows for the periods indicated (in thousands): | | | | | | Provision for | | | | | | | | | | | | | | Beginning | | | (Recovery of) | | | | | | | | | Ending | | | | | Balance | | | Loan Losses | | | Charge-offs | | | Recoveries | | | Balance | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2016 | | | | | | | | | | | | | | | | | | | | | | Construction and land development | | | | | | | | | | | | | | | | | | | | | | Residential | | $ | 30 | | | $ | 10 | | | $ | - | | | $ | 1 | | | $ | 41 | | | Commercial | | | 291 | | | | 9 | | | | (10) | | | | 10 | | | | 300 | | | | | | 321 | | | | 19 | | | | (10) | | | | 11 | | | | 341 | | | Commercial real estate | | | | | | | | | | | | | | | | | | | | | | Owner occupied | | | 1,167 | | | | (490) | | | | (66) | | | | - | | | | 611 | | | Non-owner occupied | | | 460 | | | | (106) | | | | (1) | | | | 53 | | | | 406 | | | Multifamily | | | 51 | | | | 5 | | | | - | | | | - | | | | 56 | | | Farmland | | | 17 | | | | (139) | | | | - | | | | 125 | | | | 3 | | | | | | 1,695 | | | | (730) | | | | (67) | | | | 178 | | | | 1,076 | | | Consumer real estate | | | | | | | | | | | | | | | | | | | | | | Home equity lines | | | 448 | | | | (127) | | | | (53) | | | | 3 | | | | 271 | | | Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | | First deed of trust | | | 602 | | | | (40) | | | | (140) | | | | 25 | | | | 447 | | | Second deed of trust | | | 111 | | | | 21 | | | | (25) | | | | 29 | | | | 136 | | | | | | 1,161 | | | | (146) | | | | (218) | | | | 57 | | | | 854 | | | Commercial and industrial loans (except those secured by real estate) | | | 94 | | | | 44 | | | | (15) | | | | 100 | | | | 223 | | | Student loans | | | 230 | | | | 149 | | | | (221) | | | | - | | | | 158 | | | Consumer and other | | | 2 | | | | 10 | | | | (13) | | | | 9 | | | | 8 | | | Unallocated | | | 59 | | | | 654 | | | | - | | | | - | | | | 713 | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 3,562 | | | $ | - | | | $ | (544) | | | $ | 355 | | | $ | 3,373 | | | | | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2015 | | | | | | | | | | | | | | | | | | | | | | Construction and land development | | | | | | | | | | | | | | | | | | | | | | Residential | | $ | 34 | | | $ | (6) | | | $ | - | | | $ | 2 | | | $ | 30 | | | Commercial | | | 202 | | | | 292 | | | | (252) | | | | 49 | | | | 291 | | | | | | 236 | | | | 286 | | | | (252) | | | | 51 | | | | 321 | | | Commercial real estate | | | | | | | | | | | | | | | | | | | | | | Owner occupied | | | 1,837 | | | | (576) | | | | (127) | | | | 33 | | | | 1,167 | | | Non-owner occupied | | | 607 | | | | (151) | | | | - | | | | 4 | | | | 460 | | | Multifamily | | | 77 | | | | (26) | | | | - | | | | - | | | | 51 | | | Farmland | | | 130 | | | | (113) | | | | - | | | | - | | | | 17 | | | | | | 2,651 | | | | (866) | | | | (127) | | | | 37 | | | | 1,695 | | | Consumer real estate | | | | | | | | | | | | | | | | | | | | | | Home equity lines | | | 469 | | | | 36 | | | | (62) | | | | 5 | | | | 448 | | | Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | | First deed of trust | | | 1,345 | | | | (1,020) | | | | (103) | | | | 380 | | | | 602 | | | Second deed of trust | | | 275 | | | | (159) | | | | (55) | | | | 50 | | | | 111 | | | | | | 2,089 | | | | (1,143) | | | | (220) | | | | 435 | | | | 1,161 | | | | | | | | | | | | | | | | | | | | | | | | | Commercial and industrial loans (except those secured by real estate) | | | 506 | | | | (350) | | | | (162) | | | | 100 | | | | 94 | | | Student loans | | | 217 | | | | 13 | | | | - | | | | - | | | | 230 | | | Consumer and other | | | 30 | | | | 1 | | | | (55) | | | | 26 | | | | 2 | | | Unallocated | | | - | | | | 59 | | | | - | | | | - | | | | 59 | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 5,729 | | | $ | (2,000) | | | $ | (816) | | | $ | 649 | | | $ | 3,562 | | | | | | | | Provision for | | | | | | | | | | | | | | Beginning | | | (Recovery of) | | | | | | | | | Ending | | | | | Balance | | | Loan Losses | | | Charge-offs | | | Recoveries | | | Balance | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2014 | | | | | | | | | | | | | | | | | | | | | | Construction and land development | | | | | | | | | | | | | | | | | | | | | | Residential | | $ | 135 | | | $ | (103) | | | $ | - | | | $ | 2 | | | $ | 34 | | | Commercial | | | 1,274 | | | | (1,016) | | | | (100) | | | | 44 | | | | 202 | | | | | | 1,409 | | | | (1,119) | | | | (100) | | | | 46 | | | | 236 | | | Commercial real estate | | | | | | | | | | | | | | | | | | | | | | Owner occupied | | | 1,200 | | | | 1,268 | | | | (631) | | | | - | | | | 1,837 | | | Non-owner occupied | | | 670 | | | | 430 | | | | (518) | | | | 25 | | | | 607 | | | Multifamily | | | 19 | | | | 58 | | | | - | | | | - | | | | 77 | | | Farmland | | | 337 | | | | (111) | | | | (96) | | | | - | | | | 130 | | | | | | 2,226 | | | | 1,645 | | | | (1,245) | | | | 25 | | | | 2,651 | | | Consumer real estate | | | | | | | | | | | | | | | | | | | | | | Home equity lines | | | 424 | | | | 506 | | | | (476) | | | | 15 | | | | 469 | | | Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | | First deed of trust | | | 1,992 | | | | (442) | | | | (277) | | | | 72 | | | | 1,345 | | | Second deed of trust | | | 394 | | | | (223) | | | | (86) | | | | 190 | | | | 275 | | | | | | 2,810 | | | | (159) | | | | (839) | | | | 277 | | | | 2,089 | | | Commercial and industrial loans (except those secured by real estate) | | | 724 | | | | (447) | | | | (172) | | | | 401 | | | | 506 | | | Student loans | | | - | | | | 217 | | | | - | | | | - | | | | 217 | | | Consumer and other | | | 70 | | | | (37) | | | | (25) | | | | 22 | | | | 30 | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 7,239 | | | $ | 100 | | | $ | (2,381) | | | $ | 771 | | | $ | 5,729 | |
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| Allowances For Loans Losses And Loans Evaluated For Impairment [Table Text Block] |
| | | Recorded Investment in Loans | | | | | Allowance | | Loans | | | | | Ending | | | | | | Ending | | | | | | | | | Balance | | Individually | | Collectively | | Balance | | Individually | | Collectively | | | | | | | | | | | | | | | | | | Year Ended December 31, 2016 | | | | | | | | | | | | | | | | | | | | | Construction and land development | | | | | | | | | | | | | | | | | | | | | Residential | | $ | 41 | | $ | - | | $ | 41 | | $ | 6,770 | | $ | - | | $ | 6,770 | | | Commercial | | | 300 | | | 9 | | | 291 | | | 27,092 | | | 581 | | | 26,511 | | | | | | 341 | | | 9 | | | 332 | | | 33,862 | | | 581 | | | 33,281 | | | Commercial real estate | | | | | | | | | | | | | | | | | | | | | Owner occupied | | | 611 | | | 86 | | | 525 | | | 66,021 | | | 5,604 | | | 60,417 | | | Non-owner occupied | | | 406 | | | - | | | 406 | | | 57,944 | | | 2,236 | | | 55,708 | | | Multifamily | | | 56 | | | - | | | 56 | | | 8,824 | | | - | | | 8,824 | | | Farmland | | | 3 | | | - | | | 3 | | | 310 | | | - | | | 310 | | | | | | 1,076 | | | 86 | | | 990 | | | 133,099 | | | 7,840 | | | 125,259 | | | Consumer real estate | | | | | | | | | | | | | | | | | | | | | Home equity lines | | | 271 | | | - | | | 271 | | | 20,691 | | | 703 | | | 19,988 | | | Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | First deed of trust | | | 447 | | | 144 | | | 303 | | | 54,791 | | | 5,064 | | | 49,727 | | | Second deed of trust | | | 136 | | | 90 | | | 46 | | | 5,768 | | | 709 | | | 5,059 | | | | | | 854 | | | 234 | | | 620 | | | 81,250 | | | 6,476 | | | 74,774 | | | Commercial and industrial loans (except those secured by real estate) | | | 223 | | | 6 | | | 217 | | | 39,390 | | | 544 | | | 38,846 | | | Student loans | | | 158 | | | - | | | 158 | | | 47,398 | | | - | | | 47,398 | | | Consumer and other | | | 721 | | | - | | | 721 | | | 2,101 | | | - | | | 2,101 | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 3,373 | | $ | 335 | | $ | 3,038 | | $ | 337,100 | | $ | 15,441 | | $ | 321,659 | | | | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2015 | | | | | | | | | | | | | | | | | | | | | Construction and land development | | | | | | | | | | | | | | | | | | | | | Residential | | $ | 30 | | $ | - | | $ | 30 | | $ | 5,202 | | $ | - | | $ | 5,202 | | | Commercial | | | 291 | | | 2 | | | 289 | | | 25,948 | | | 1,822 | | | 24,126 | | | | | | 321 | | | 2 | | | 319 | | | 31,150 | | | 1,822 | | | 29,328 | | | Commercial real estate | | | | | | | | | | | | | | | | | | | | | Owner occupied | | | 1,167 | | | 383 | | | 784 | | | 69,256 | | | 6,785 | | | 62,471 | | | Non-owner occupied | | | 460 | | | 26 | | | 434 | | | 38,037 | | | 2,867 | | | 35,170 | | | Multifamily | | | 51 | | | - | | | 51 | | | 8,537 | | | - | | | 8,537 | | | Farmland | | | 17 | | | - | | | 17 | | | 388 | | | - | | | 388 | | | | | | 1,695 | | | 409 | | | 1,286 | | | 116,218 | | | 9,652 | | | 106,566 | | | Consumer real estate | | | | | | | | | | | | | | | | | | | | | Home equity lines | | | 448 | | | - | | | 448 | | | 20,333 | | | 1,238 | | | 19,095 | | | Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | First deed of trust | | | 602 | | | 324 | | | 278 | | | 56,776 | | | 5,759 | | | 51,017 | | | Second deed of trust | | | 111 | | | 98 | | | 13 | | | 6,485 | | | 1,212 | | | 5,273 | | | | | | 1,161 | | | 422 | | | 739 | | | 83,594 | | | 8,209 | | | 75,385 | | | Commercial and industrial loans (except those secured by real estate) | | | 94 | | | 18 | | | 76 | | | 20,086 | | | 826 | | | 19,260 | | | Student loans | | | 230 | | | - | | | 230 | | | 53,989 | | | - | | | 53,989 | | | Consumer and other | | | 61 | | | - | | | 61 | | | 1,734 | | | - | | | 1,734 | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 3,562 | | $ | 851 | | $ | 2,711 | | $ | 306,771 | | $ | 20,509 | | $ | 286,262 | | | | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2014 | | | | | | | | | | | | | | | | | | | | | Construction and land development | | | | | | | | | | | | | | | | | | | | | Residential | | $ | 34 | | $ | - | | $ | 34 | | $ | 4,315 | | $ | 164 | | $ | 4,151 | | | Commercial | | | 202 | | | 26 | | | 176 | | | 25,152 | | | 3,968 | | | 21,184 | | | | | | 236 | | | 26 | | | 210 | | | 29,467 | | | 4,132 | | | 25,335 | | | Commercial real estate | | | | | | | | | | | | | | | | | | | | | Owner occupied | | | 1,837 | | | 905 | | | 932 | | | 58,804 | | | 8,311 | | | 50,493 | | | Non-owner occupied | | | 607 | | | - | | | 607 | | | 38,892 | | | 6,593 | | | 32,299 | | | Multifamily | | | 77 | | | - | | | 77 | | | 11,438 | | | 2,322 | | | 9,116 | | | Farmland | | | 130 | | | - | | | 130 | | | 434 | | | 21 | | | 413 | | | | | | 2,651 | | | 905 | | | 1,746 | | | 109,568 | | | 17,247 | | | 92,321 | | | Consumer real estate | | | | | | | | | | | | | | | | | | | | | Home equity lines | | | 469 | | | - | | | 469 | | | 20,082 | | | 800 | | | 19,282 | | | Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | First deed of trust | | | 1,345 | | | 200 | | | 1,145 | | | 61,837 | | | 7,900 | | | 53,937 | | | Second deed of trust | | | 275 | | | 142 | | | 133 | | | 7,854 | | | 1,360 | | | 6,494 | | | | | | 2,089 | | | 342 | | | 1,747 | | | 89,773 | | | 10,060 | | | 79,713 | | | Commercial and industrial loans (except those secured by real estate) | | | 506 | | | 239 | | | 267 | | | 22,165 | | | 818 | | | 21,347 | | | Student loans | | | 217 | | | - | | | 217 | | | 33,562 | | | - | | | 33,562 | | | Consumer and other | | | 30 | | | - | | | 30 | | | 1,611 | | | 23 | | | 1,588 | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 5,729 | | $ | 1,512 | | $ | 4,217 | | $ | 286,146 | | $ | 32,280 | | $ | 253,866 | |
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