Other Borrowings and Securities Sold Under Repurchase Agreements (Securities sold under repurchase agreements with Company customers) - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2017 |
Dec. 31, 2018 |
|
Assets Sold under Agreements to Repurchase [Line Items] | ||
Securities sold under repurchase agreement | $ 324,154 | $ 284,720 |
Weighted Average [Member] | ||
Assets Sold under Agreements to Repurchase [Line Items] | ||
Assets sold under repurchase agreement, interest rate | 0.39% | 0.93% |
Minimum [Member] | ||
Assets Sold under Agreements to Repurchase [Line Items] | ||
Repurchase agreement counterparty, weighted average maturity of agreements | 6 months | |
Maximum [Member] | ||
Assets Sold under Agreements to Repurchase [Line Items] | ||
Repurchase agreement counterparty, weighted average maturity of agreements | 24 months | |
Repurchase Agreement with 3 To 24 Maturity Months [Member] | ||
Assets Sold under Agreements to Repurchase [Line Items] | ||
Securities sold under repurchase agreement | $ 8,900 |