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Off-Balance Sheet Transactions and Guarantees (Tables) | 12 Months Ended
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Dec. 31, 2018
Off-Balance Sheet Transactions and Guarantees [Abstract] |
Off-Balance Sheet Financial Instruments | At December 31, CTBI had the following off-balance sheet financial instruments, whose approximate contract amounts represent additional credit risk to CTBI:
(in thousands) |  | 2018 |  |  | 2017 |
Standby letters of credit |  | $ | 29,410 |  |  | $ | 29,308 |
Commitments to extend credit |  |  | 510,513 |  |  |  | 516,731 |
Total off-balance sheet financial instruments |  | $ | 539,923 |  |  | $ | 546,039 |

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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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