Lease Accounting - Lessee, Minimum Lease Payments (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Lease Payments
2019 (excluding 6 months ended June 30, 2019)	$ 11,185
2020	19,219
2021	13,351
2022	8,218
2023	7,982
Thereafter	19,706
Total future minimum lease payments	79,661
Less: Interest	(11,040)
Total future minimum lease payments less interest	68,621
Finance Lease Payments
2019 (excluding 6 months ended June 30, 2019)	8,293
2020	16,000
2021	14,723
2022	9,518
2023	6,485
Thereafter	9,183
Total future minimum lease payments	64,202
Less: Interest	(8,859)
Total future minimum lease payments less interest	55,343
Total Lease Payments
2019 (excluding 6 months ended June 30, 2019)	19,478
2020	35,219
2021	28,074
2022	17,736
2023	14,467
Thereafter	28,889
Total future minimum lease payments	143,863
Less: Interest	(19,899)
Total future minimum lease payments less interest	123,964
Accounts payable and accrued expenses
Operating Lease Payments
Total future minimum lease payments less interest	193
Finance Lease Payments
Total future minimum lease payments less interest	51
Total Lease Payments
Total future minimum lease payments less interest	244
Operating lease obligations
Operating Lease Payments
Total future minimum lease payments less interest	68,428
Finance Lease Payments
Total future minimum lease payments less interest	0
Total Lease Payments
Total future minimum lease payments less interest	68,428
Finance lease obligations
Operating Lease Payments
Total future minimum lease payments less interest	0
Finance Lease Payments
Total future minimum lease payments less interest	55,292
Total Lease Payments
Total future minimum lease payments less interest	$ 55,292