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Loans and Allowance for Loan Losses - Activity in ALL by Class of Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | $ 55,108 | $ 52,200 | $ 51,389 | $ 51,666
Charge- offs | (2,177) | (1,271) | (3,105) | (2,542)
Recoveries | 239 | 199 | 769 | 465
Net charge- offs | (1,938) | (1,072) | (2,336) | (2,077)
Provisions charged to operations | 2,758 | 747 | 6,875 | 2,286
Balance at end of period | 55,928 | 51,875 | 55,928 | 51,875
Real Estate [Member] | Non-residential Real Estate Owner Occupied [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 6,887 | 6,426 | 6,328 | 6,195
Charge- offs | (2) | (179) | (11) | (198)
Recoveries | 1 | 15 | 2 | 16
Net charge- offs | (1) | (164) | (9) | (182)
Provisions charged to operations | 72 | 164 | 639 | 413
Balance at end of period | 6,958 | 6,426 | 6,958 | 6,426
Real Estate [Member] | Non-residential Real Estate Other [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 11,287 | 10,705 | 11,027 | 10,519
Charge- offs | (35) | (8) | (57) | (9)
Recoveries | 33 |  | 34 | 39
Net charge- offs | (2) | (8) | (23) | 30
Provisions charged to operations | 478 | (49) | 759 | 99
Balance at end of period | 11,763 | 10,648 | 11,763 | 10,648
Real Estate [Member] | Residential Real Estate Permanent Mortgage [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 3,325 | 3,307 | 3,261 | 3,226
Charge- offs | (63) | (39) | (130) | (101)
Recoveries | 2 |  | 11 | 26
Net charge- offs | (61) | (39) | (119) | (75)
Provisions charged to operations | 97 | 43 | 219 | 160
Balance at end of period | 3,361 | 3,311 | 3,361 | 3,311
Real Estate [Member] | Residential Real Estate All Other [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 11,721 | 10,123 | 10,673 | 9,672
Charge- offs | (29) | (71) | (224) | (312)
Recoveries | 2 | 95 | 29 | 101
Net charge- offs | (27) | 24 | (195) | (211)
Provisions charged to operations | 507 | 274 | 1,723 | 960
Balance at end of period | 12,201 | 10,421 | 12,201 | 10,421
Commercial and Financial [Member] | Non-consumer Non-real Estate [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 15,232 | 15,069 | 13,151 | 15,334
Charge- offs | (244) | (343) | (401) | (652)
Recoveries | 49 | 7 | 201 | 30
Net charge- offs | (195) | (336) | (200) | (622)
Provisions charged to operations | 347 | (337) | 2,433 | (316)
Balance at end of period | 15,384 | 14,396 | 15,384 | 14,396
Consumer Non-real Estate [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 3,234 | 2,839 | 3,065 | 2,793
Charge- offs | (287) | (294) | (569) | (738)
Recoveries | 66 | 70 | 175 | 194
Net charge- offs | (221) | (224) | (394) | (544)
Provisions charged to operations | 261 | 298 | 603 | 664
Balance at end of period | 3,274 | 2,913 | 3,274 | 2,913
Other Loans [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 2,449 | 2,328 | 2,423 | 2,481
Charge- offs |  |  |  | (2)
Recoveries | 9 | 6 | 87 | 30
Net charge- offs | 9 | 6 | 87 | 28
Provisions charged to operations | 189 | 88 | 137 | (87)
Balance at end of period | 2,647 | 2,422 | 2,647 | 2,422
Acquired Loans [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Balance at beginning of period | 973 | 1,403 | 1,461 | 1,446
Charge- offs | (1,517) | (337) | (1,713) | (530)
Recoveries | 53 | 6 | 206 | 29
Net charge- offs | (1,464) | (331) | (1,507) | (501)
Provisions charged to operations | 767 | 266 | 322 | 393
Balance at end of period | 276 | $ 1,338 | 276 | $ 1,338
Pegasus Bank [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Recoveries | 24 |  | 24 |
Net charge- offs | 24 |  | 24 |
Provisions charged to operations | 40 |  | 40 |
Balance at end of period | $ 64 |  | $ 64 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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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