Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for losses on net investment in leases at end of period	$ 9,136	$ 10,871
Loans receivable and other lending investments, allowances	$ 6,370	$ 13,170
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized (in shares)	200,000	200,000
Common Stock, shares issued (in shares)	70,031	73,967
Common Stock, shares outstanding (in shares)	70,031	73,967