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Commitments (Tables)
12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Commitments
The contractual amounts of off-balance-sheet financial instruments as of December 31, 2020, and December 31, 2019, are as follows: 
(in thousands)December 31, 2020December 31, 2019
Commitments to extend credit$1,946,068 $1,469,413 
Letters of credit50,971 47,969 
State tax credits24,473 28,035 
Low-income housing tax credits— 704 
Limited partnership commitments23,400 20,829