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Financial Instruments with Off-Balance-Sheet Risk (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Financial Instruments Outstanding Contract Amounts Represent Credit Risk
As of December 31, 2019 and 2018, the following off-balance sheet commitments, financial instruments and other arrangements were outstanding:
December 31,
(amounts in thousands)20192018
Commitments to fund loans and leases$261,902  $345,608  
Unfunded commitments to fund mortgage warehouse loans1,378,364  1,537,900  
Unfunded commitments under lines of credit and credit cards1,065,474  867,131  
Letters of credit48,856  55,659  
Other unused commitments2,736  4,822