Loans and Leases - Leasing and Equipment Finance Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Direct financing, sales-type leases and operating leases, Future minimum payments receivable, Fiscal year maturity
2019	$ 986,449
2020	739,766
2021	520,985
2022	301,757
2023	145,156
Thereafter	57,194
Total	2,751,307
Leasing and equipment finance
Loans and Leases Receivable Disclosure
Leases	2,500,000	$ 2,500,000
Loans	$ 2,200,000	$ 2,300,000