Leases Leases (Schedule of Maturity of Lease Receivables) (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Leases [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of 2019	$ 51,888
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2020	200,390
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2021	156,798
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2022	117,779
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, 2023	86,746
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, After 2023	160,852
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	774,453
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	63,777
Sales-type and Direct Financing Leases, Lease Receivable	710,676
Lessor, Operating Lease, Payments to be Received, Remainder of 2019	1,918
Lessor, Operating Lease, Payments to be Received, 2020	7,057
Lessor, Operating Lease, Payments to be Received, 2021	7,036
Lessor, Operating Lease, Payments to be Received, 2022	13,314
Lessor, Operating Lease, Payments to be Received, 2023	5,084
Lessor, Operating Lease, Payments to be Received, After 2023	13,096
Lessor, Operating Lease, Payments to be Received	47,505
Lessor, Total Payments to be Received, Remainder of 2019	53,806
Lessor, Total Payments to be Received, 2020	207,447
Lessor, Total Payments to be Received, 2021	163,834
Lessor, Total Payments to be Received, 2022	131,093
Lessor, Total Payments to be Received, 2023	91,830
Lessor, Total Payments to be Received, After 2023	173,948
Lessor, Total Payments to be Received	$ 821,958