Leases (Other Information) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Operating Leases:
ROU assets recorded under operating leases	$ 208,943	$ 208,943
Accumulated amortization associated with operating leases	(26,670)	(26,670)
Total operating leases ROU assets, net	182,273	182,273
Operating lease liabilities	35,042	35,042
Liabilities recorded under operating leases (non-current)	146,839	146,839
Total operating leases liabilities	181,881	181,881
Operating lease expense	13,858	43,864
Variable lease expense	1,119	3,999
Total operating lease expense	14,977	47,863
Finance Leases:
ROU assets recorded under finance leases	16,230	16,230
Accumulated depreciation associated with finance leases	(5,015)	(5,015)
Total finance leases ROU assets, net	11,215	11,215
Total finance lease liabilities	11,246	11,246
Amortization of finance lease ROU assets	993	3,280
Interest on lease liabilities	102	253
Total finance lease expense	$ 1,095	$ 3,533