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Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | $ 37,133 | $ 35,697 | $ 35,933 | $ 36,094 | $ 36,094
Provision charged to expense | 666 | 2,191 | 4,659 | 5,829 | 7,872
Losses charged off | (2,443) | (2,962) | (7,123) | (8,729) | (11,668)
Recoveries | 1,035 | 875 | 2,922 | 2,607 | 3,635
Ending balance | 36,391 | 35,801 | 36,391 | 35,801 | 35,933
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 1,391 | 1,149 | 1,391 | 1,149 | 1,313
Collectively evaluated for impairment | 35,000 | 34,652 | 35,000 | 34,652 | 34,620
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 46,199 | 55,045 | 46,199 | 55,045 | 52,202
Collectively evaluated for impairment | 3,067,222 | 2,876,254 | 3,067,222 | 2,876,254 | 2,886,169
Commercial [Member] | Construction [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 669 | 1,437 | 884 | 2,199 | 2,199
Provision charged to expense | (19) | 54 | (239) | (701) | (1,035)
Losses charged off | (6) | (79) | (10) | (94) | (316)
Recoveries | 28 | 18 | 37 | 26 | 36
Ending balance | 672 | 1,430 | 672 | 1,430 | 884
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 25 | 212 | 25 | 212 | 213
Collectively evaluated for impairment | 647 | 1,218 | 647 | 1,218 | 671
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 4,766 | 5,938 | 4,766 | 5,938 | 5,609
Collectively evaluated for impairment | 69,516 | 62,337 | 69,516 | 62,337 | 61,389
Commercial [Member] | Real Estate [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 15,299 | 14,438 | 14,191 | 14,434 | 14,434
Provision charged to expense | (1) | 585 | 1,622 | 1,726 | 1,220
Losses charged off | (249) | (319) | (776) | (1,505) | (1,641)
Recoveries | 53 | 78 | 65 | 127 | 178
Ending balance | 15,102 | 14,782 | 15,102 | 14,782 | 14,191
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 1,301 | 747 | 1,301 | 747 | 1,035
Collectively evaluated for impairment | 13,801 | 14,035 | 13,801 | 14,035 | 13,156
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 29,240 | 35,848 | 29,240 | 35,848 | 33,756
Collectively evaluated for impairment | 1,168,364 | 1,047,792 | 1,168,364 | 1,047,792 | 1,051,672
Commercial [Member] | Equipment Lease Financing [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 33 | 94 | 42 | 79 | 79
Provision charged to expense | (14) | (28) | (23) | (13) | (37)
Losses charged off | 0 | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0 | 0
Ending balance | 19 | 66 | 19 | 66 | 42
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 19 | 66 | 19 | 66 | 42
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 3,290 | 6,242 | 3,290 | 6,242 | 5,512
Commercial [Member] | Other [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 4,993 | 4,430 | 4,656 | 4,225 | 4,225
Provision charged to expense | 210 | 185 | 1,229 | 1,156 | 2,128
Losses charged off | (549) | (622) | (1,386) | (1,667) | (2,136)
Recoveries | 308 | 92 | 463 | 371 | 439
Ending balance | 4,962 | 4,085 | 4,962 | 4,085 | 4,656
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 65 | 190 | 65 | 190 | 65
Collectively evaluated for impairment | 4,897 | 3,895 | 4,897 | 3,895 | 4,591
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 10,124 | 11,770 | 10,124 | 11,770 | 11,354
Collectively evaluated for impairment | 329,213 | 343,214 | 329,213 | 343,214 | 338,805
Residential [Member] | Construction [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 581 | 558 | 629 | 550 | 550
Provision charged to expense | 49 | 8 | 0 | 144 | 264
Losses charged off | 0 | (61) | 0 | (192) | (192)
Recoveries | 0 | 4 | 1 | 7 | 7
Ending balance | 630 | 509 | 630 | 509 | 629
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 630 | 509 | 630 | 509 | 629
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 873 | 0 | 873 | 0 | 0
Collectively evaluated for impairment | 63,568 | 55,412 | 63,568 | 55,412 | 57,966
Residential [Member] | Real Estate [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 5,662 | 6,372 | 6,027 | 6,678 | 6,678
Provision charged to expense | 276 | 330 | 1 | 440 | 291
Losses charged off | (158) | (366) | (321) | (849) | (1,043)
Recoveries | 6 | 8 | 79 | 75 | 101
Ending balance | 5,786 | 6,344 | 5,786 | 6,344 | 6,027
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 5,786 | 6,344 | 5,786 | 6,344 | 6,027
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 1,196 | 1,489 | 1,196 | 1,489 | 1,483
Collectively evaluated for impairment | 711,041 | 704,539 | 711,041 | 704,539 | 701,486
Residential [Member] | Home Equity [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 747 | 819 | 774 | 839 | 839
Provision charged to expense | 113 | 3 | 87 | (1) | (20)
Losses charged off | (53) | 0 | (57) | (21) | (54)
Recoveries | 0 | 2 | 3 | 7 | 9
Ending balance | 807 | 824 | 807 | 824 | 774
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 807 | 824 | 807 | 824 | 774
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 96,755 | 89,467 | 96,755 | 89,467 | 91,511
Consumer [Member] | Consumer Direct [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 1,866 | 1,634 | 1,885 | 1,594 | 1,594
Provision charged to expense | 47 | 170 | 243 | 669 | 912
Losses charged off | (166) | (204) | (675) | (893) | (1,236)
Recoveries | 110 | 111 | 404 | 341 | 615
Ending balance | 1,857 | 1,711 | 1,857 | 1,711 | 1,885
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 1,857 | 1,711 | 1,857 | 1,711 | 1,885
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 137,657 | 131,815 | 137,657 | 131,815 | 133,093
Consumer [Member] | Consumer Indirect [Member] |  |  |  |  |
Allowance for loan losses [Roll Forward] |  |  |  |  |
Beginning balance | 7,283 | 5,915 | 6,845 | 5,496 | 5,496
Provision charged to expense | 5 | 884 | 1,739 | 2,409 | 4,149
Losses charged off | (1,262) | (1,311) | (3,898) | (3,508) | (5,050)
Recoveries | 530 | 562 | 1,870 | 1,653 | 2,250
Ending balance | 6,556 | 6,050 | 6,556 | 6,050 | 6,845
Ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | 6,556 | 6,050 | 6,556 | 6,050 | 6,845
Loans ending balance [Abstract] |  |  |  |  |
Individually evaluated for impairment | 0 | 0 | 0 | 0 | 0
Collectively evaluated for impairment | $ 487,818 | $ 435,436 | $ 487,818 | $ 435,436 | $ 444,735

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-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 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + 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 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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