Leases (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Finance Leases New		$ 23,523	$ 43,823
Rnewals and Extensions, Finance Leases		0	4,410
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		23,523	48,233
Operating Lease, New		4,684	2,883
Renewals and Extensions, Operating Leases		4,128	8,042
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		8,812	10,925
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	$ 51,126	51,126
Finance Lease, Liability, Payments, Due Year Two	32,018	32,018
Finance Lease, Liability, Payments, Due Year Three	24,504	24,504
Finance Lease, Liability, Payments, Due Year Four	28,242	28,242
Finance Lease, Liability, Payments, Due Year Five	9,711	9,711
Finance Lease, Liability, Payments, Due after Year Five	19,082	19,082
Finance Lease, Liability, Payment, Due	148,864	148,864
Finance Lease, Interest Payment on Liability		15,819
Finance Lease, Liability	164,683	164,683
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	10,836	10,836
Lessee, Operating Lease, Liability, Payments, Due Year Two	9,649	9,649
Lessee, Operating Lease, Liability, Payments, Due Year Three	7,222	7,222
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,122	6,122
Lessee, Operating Lease, Liability, Payments, Due Year Five	5,177	5,177
Lessee, Operating Lease, Liability, Payments, Due after Year Five	37,502	37,502
Operating Lease, Expense		19,268
Operating Lease, Liability	76,508	76,508
Lessee, Operating Lease, Liability, Payments, Due	57,240	57,240
Lease LIability Payments Due Next Twelve Months		61,962
Lease Liability Payments Due Year Two	41,667	41,667
Lease Liability Payments Due Year Three	31,726	31,726
Lease Liability Payments Due Year Four	34,364	34,364
Lease Liability Payments Due Year Five	14,888	14,888
Lease Liability Payments Due After Year Five	56,584	56,584
Lease Interest Expense		35,087
Lease Liability	241,191	241,191
Lease Liability Payments Due	206,104	206,104
Capital Leases, Lessee Balance Sheet [Abstract]
Operating Lease, Right-of-Use Asset	54,764	54,764	58,101
Finance Lease, Right-of-Use Asset	146,144	146,144	179,538
Leases Right of Use Asset	200,908	200,908	237,639
Operating Lease, Liability, Current	8,584	8,584	8,538
Finance Lease, Liability, Current	47,109	47,109	39,428
Leases Total Current Liability	55,693	55,693	47,966
Operating Lease, Liability, Noncurrent	48,656	48,656	52,091
Finance Lease, Liability, Noncurrent	101,755	101,755	145,824
Leases Total NonCurrent Liability	150,411	150,411	197,915
Leases, Total Liability	$ 206,104	206,104	245,881
Finance Lease Payments Cash Outflow		5,446	7,472
Finance Lease liability renewals		2,700
Lease remeasurement		$ 5,700
Property Subject to or Available for Operating Lease, Number of Units	64	64
Operating Lease, Lease Income	$ 2,500	$ 3,600
Finance Lease, Right-of-Use Asset, Amortization		41,938	42,147
Finance Lease, Interest Expense		5,955	6,882
Finance Lease Cost		47,893	49,029
Operating Lease, Cost		12,196	12,502
Variable Lease, Cost		29	1,089
Lease, Cost		$ 60,118	$ 62,620
Operating Lease, Weighted Average Discount Rate, Percent	4.30%	4.30%	4.60%
Finance Lease, Weighted Average Discount Rate, Percent	3.30%	3.30%	3.50%
Operating Lease, Payments		$ 12,190	$ 12,568
Finance Lease, Interest Payment on Liability		15,819
Finance Lease, Principal Payments		43,598	42,627
Total Lease Payments		61,234	$ 62,667
Lessor, Operating Lease, Payments to be Received, Next Twelve Months	$ 4,466	4,466
Lessor, Operating Lease, Payments to be Received, Two Years	4,053	4,053
Lessor, Operating Lease, Payments to be Received, Three Years	3,345	3,345
Lessor, Operating Lease, Payments to be Received, Four Years	2,929	2,929
Lessor, Operating Lease, Payments to be Received, Five Years	2,631	2,631
Lessor, Operating Lease, Payments to be Received, Thereafter	21,956	21,956
Lessor, Operating Lease, Payments to be Received	$ 39,380	$ 39,380