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Financial Instruments with Off-Balance-Sheet Risk (Tables)
12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Financial Instruments Outstanding Contract Amounts Represent Credit Risk
As of December 31, 2020 and 2019, the following off-balance sheet commitments, financial instruments and other arrangements were outstanding:
December 31,
(amounts in thousands)20202019
Commitments to fund loans and leases$262,153 $261,902 
Unfunded commitments to fund mortgage warehouse loans1,933,067 1,378,364 
Unfunded commitments under lines of credit and credit cards1,009,031 1,065,474 
Letters of credit27,166 48,856 
Other unused commitments1,842 2,736