Allowance for Credit Losses - Financing Receivable Credit Quality (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	$ 21,330,419	$ 17,086,749	$ 17,024,805
Ba2
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	4,198,118		0
Ba3
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	949,418		0
B1
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	14,918,185		15,761,205
B2
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	870,774		917,138
B3
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	279,740		281,450
N/A
Financing Receivable, Credit Quality Indicator
Investments in leases - sales-type and financing receivable, Investments in loans and Other assets	$ 114,183		$ 65,012