Loans and Leases - Components of Net Investment in Direct Financing and Sales-type Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Carrying amount	$ 2,893,070	$ 2,794,212
Unguaranteed residual assets	170,930	152,030
Net direct fees and costs and unearned income	(246,769)	(246,373)
Total net investment in sales-type and direct financing leases	$ 2,817,231	$ 2,699,869