Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$ 12,045	$ 12,045	$ 46,998
Capital Leases, Future Minimum Payments Due in Two Years	44,461	44,461	51,943
Capital Leases, Future Minimum Payments Due in Three Years	63,019	63,019	57,881
Capital Leases, Future Minimum Payments Due in Four Years	26,906	26,906	21,842
Capital Leases, Future Minimum Payments Due in Five Years	19,556	19,556	15,587
Capital Leases, Future Minimum Payments Due Thereafter	48,136	48,136	40,447
Capital Leases, Future Minimum Payments Due	214,123	214,123	234,698
Capital Leases, Future Minimum Payments, Interest Included in Payments	(22,693)	(22,693)	(22,746)
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	191,430	191,430	211,952
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	2,488	2,488	11,295
Lessee, Operating Lease, Liability, Payments, Due Year Two	11,732	11,732	9,550
Lessee, Operating Lease, Liability, Payments, Due Year Three	10,270	10,270	8,251
Lessee, Operating Lease, Liability, Payments, Due Year Four	8,693	8,693	7,282
Lessee, Operating Lease, Liability, Payments, Due Year Five	6,410	6,410	5,397
Lessee, Operating Lease, Liability, Payments, Due after Year Five	45,277	45,277	37,841
Lessee, Operating Lease, Liability, Payments, Due	84,870	84,870	$ 79,616
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(22,223)	(22,223)
Operating Lease, Liability	$ 62,647	$ 62,647
Property Subject to or Available for Operating Lease, Number of Units	62	62
Lease Liability Payments Remainder Of Fiscal Year	$ 14,533	$ 14,533
Lease Liability Payments Due Year Two	56,193	56,193
Lease Liability Payments Due Year Three	73,289	73,289
Lease Liability Payments Due Year Four	35,599	35,599
Lease Liability Payments Due Year Five	25,966	25,966
Lease Liability Payments Due After Year Five	93,413	93,413
Lease Liability Payments Due	298,993	298,993
Lease Liability Undiscounted Excess Amount	44,916	44,916
Lease Liability	254,077	254,077
Operating Lease, Lease Income	600	2,000
Lessor, Operating Lease, Payments to be Received, Next Twelve Months	598	598
Lessor, Operating Lease, Payments to be Received, Two Years	1,722	1,722
Lessor, Operating Lease, Payments to be Received, Three Years	1,364	1,364
Lessor, Operating Lease, Payments to be Received, Four Years	1,037	1,037
Lessor, Operating Lease, Payments to be Received, Five Years	470	470
Lessor, Operating Lease, Payments to be Received, Thereafter	230	230
Lessor, Operating Lease, Payments to be Received	5,421	5,421
Lease, Cost [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	10,474	31,786
Finance Lease, Interest Expense	1,989	5,273
Finance Lease Cost	12,463	37,059
Operating Lease, Cost	3,151	9,419
Variable Lease, Cost	201	993
Lease, Cost	$ 15,815	$ 47,471