Leases - Direct Financing Lease Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Income from DFLs	$ 17,287	$ 23,616	$ 23,820
Cash payments received	$ 16,005	$ 19,633	$ 19,494