Leases Direct Financing Lease (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Total minimum lease payments receivable	$ 17,031	$ 17,468
Less: Unearned income	3,265	3,422
Recorded net investment in sales-type lease	13,766	14,046
Other accounts receivable	1,151	1,138
Long-term receivables	12,615	12,908
Total	13,766	$ 14,046
2019	1,300
2020	1,700
2021	1,700
2022	1,700
2023	1,700
Thereafter	$ 8,700