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Securities Sold Under Agreements to Repurchase
 3 Months Ended
Mar. 31, 2020
Transfers and Servicing [Abstract]  
Securities Sold Under Agreements to Repurchase Securities Sold Under Agreements to Repurchase
The Company’s securities sold under agreements to repurchase (“repurchase agreements”) totaled $580,335,000 and $569,824,000 at March 31, 2020 and December 31, 2019, respectively, and are secured by debt securities with carrying values of $778,035,000 and $711,210,000, 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. The following tables summarize the carrying value of the Company’s repurchase agreements by remaining contractual maturity and category of collateral:

March 31, 2020
Remaining Contractual Maturity
of the Agreements
(Dollars in thousands)Overnight and ContinuousTotal
Residential mortgage-backed securities$328,722  328,722  
Commercial mortgage-backed securities251,613  251,613  
Total$580,335  580,335  

December 31, 2019
Remaining Contractual Maturity
of the Agreements
(Dollars in thousands)Overnight and ContinuousTotal
Residential mortgage-backed securities$312,015  312,015  
Commercial mortgage-backed securities257,809  257,809  
Total$569,824  569,824