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Securities Sold Under Agreements to Repurchase
 9 Months Ended
Sep. 30, 2020
Transfers and Servicing [Abstract]  
Securities Sold Under Agreements to Repurchase Securities Sold Under Agreements to Repurchase
The following table summarizes the carrying value of the Company’s securities sold under agreements to repurchase (“repurchase agreements”) by remaining contractual maturity of the agreements and category of collateral:

Overnight and Continuous
(Dollars in thousands)September 30,
2020		December 31,
2019
State and local governments$742,753 — 
Corporate bonds222,915 — 
Residential mortgage-backed securities— 312,015 
Commercial mortgage-backed securities— 257,809 
Total$965,668 569,824 
The repurchase agreements are secured by debt securities with carrying values of $1,096,781,000 and $711,210,000 at September 30, 2020 and December 31, 2019, respectively. Securities are pledged to customers at the time of the transaction in an amount at least equal to the outstanding balance and are held in custody accounts by third parties. The fair value of collateral is continually monitored and additional collateral is provided as deemed appropriate.