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Loans and Allowance for Loan Losses - Activity in ALL by Class of Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | $ 51,389 | $ 51,666
Charge- offs | (343) | (599)
Recoveries | 185 | 169
Net charge- offs | (158) | (430)
Provisions charged to operations | 1,684 | 314
Balance at end of period | 52,915 | 51,550
Real Estate [Member] | Non-residential Real Estate Owner Occupied [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 6,328 | 6,195
Charge- offs | (6) | (19)
Recoveries | 1 | 1
Net charge- offs | (5) | (18)
Provisions charged to operations | 332 | 473
Balance at end of period | 6,655 | 6,650
Real Estate [Member] | Non-residential Real Estate Other [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 11,027 | 10,519
Charge- offs | (6) | (1)
Recoveries |  | 39
Net charge- offs | (6) | 38
Provisions charged to operations | 341 | (9)
Balance at end of period | 11,362 | 10,548
Real Estate [Member] | Residential Real Estate Permanent Mortgage [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 3,261 | 3,226
Charge- offs | (63) | (56)
Recoveries | 5 | 3
Net charge- offs | (58) | (53)
Provisions charged to operations | 58 | 108
Balance at end of period | 3,261 | 3,281
Real Estate [Member] | Residential Real Estate All Other [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 10,673 | 9,672
Charge- offs | (52) | (90)
Recoveries | 2 | 3
Net charge- offs | (50) | (87)
Provisions charged to operations | 423 | 246
Balance at end of period | 11,046 | 9,831
Commercial and Financial [Member] | Non-consumer Non-real Estate [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 13,151 | 15,334
Charge- offs | (70) | (156)
Recoveries | 67 | 13
Net charge- offs | (3) | (143)
Provisions charged to operations | 1,261 | (406)
Balance at end of period | 14,409 | 14,785
Consumer Non-real Estate [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 3,065 | 2,793
Charge- offs | (120) | (250)
Recoveries | 71 | 80
Net charge- offs | (49) | (170)
Provisions charged to operations | 56 | 76
Balance at end of period | 3,072 | 2,699
Other Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 2,423 | 2,481
Recoveries | 35 | 12
Net charge- offs | 35 | 12
Provisions charged to operations | (50) | (157)
Balance at end of period | 2,408 | 2,336
Acquired Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 1,461 | 1,446
Charge- offs | (26) | (27)
Recoveries | 4 | 18
Net charge- offs | (22) | (9)
Provisions charged to operations | (737) | (17)
Balance at end of period | $ 702 | $ 1,420

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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=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://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=84173941&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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- 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://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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -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 5: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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