Leases - Maturity Analysis of Lessor and Lessee Arrangements (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract]
2019	$ 86,787
2020	96,830
2021	80,580
2022	59,226
2023	37,135
Thereafter	23,260
Total lease payments	383,818
Less: present value discount	(33,823)
Total	349,995
Operating Lease Liabilities, Payments Due [Abstract]
2019	26,352
2020	35,103
2021	34,295
2022	32,639
2023	29,195
Thereafter	244,608
Total lease payments	402,192
Less: present value discount	(90,830)
Total	311,362
Finance Lease Liabilities, Payments, Due [Abstract]
2019	513
2020	684
2021	684
2022	684
2023	0
Thereafter	0
Total lease payments	2,565
Less: present value discount	(402)
Total	$ 2,163