XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.19.2

Outstanding Commitments and Contingent Liabilities (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Outstanding Commitments and Contingent Liabilities |
Schedule of contractual amount of exposure to off-balance-sheet risk | A summary of the contractual amount of the Company’s exposure to off-balance-sheet risk relating to the Company’s commitments to extend credit and standby letters of credit follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2019 |  | December 31, 2018
Financial instruments whose contract amounts represent credit risk: | ​ | ​ | ​ | ​ | ​ | ​
Commitments to extend credit | ​ | $ | 1,567,091 | ​ | $ | 1,398,483
Standby letters of credit | ​ |  | 37,560 | ​ |  | 32,156
​

X
- Definition Tabular disclosure of contractual amount of exposure to off-balance-sheet risk, wherein exposure to credit loss is represented by the contractual amount of those commitments. + References No definition available. + Details
Name: | buse_ScheduleOfContractualAmountOfExposureToOffBalanceSheetRiskTableTextBlock
Namespace Prefix: | buse_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration