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Lease (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Lease, Cost [Table Text Block]

The components of lease costs recognized on the statements of income were as follows:

						Year Ended December 31,
(in thousands)			Classification on the Statements of Income			2021						2020
Finance lease costs:
Amortization of assets			Depreciation and amortization			$	13,274					$	6,631
Interest on lease liabilities			Interest expense			11,168						5,335
Operating lease cost			Aircraft lease rentals; Station operations; Maintenance and repairs; Other operating expense			22,697						12,616
Variable lease cost			Station operations; Maintenance and repairs; Other operating expense			2,565						3,560
Total lease cost						$	49,704					$	28,142

Leases of Lessee Disclosure [Text Block]

The table below presents the lease-related assets and liabilities recorded on the balance sheet.

						As of December 31,
(in thousands)			Classification on the Balance Sheet			2021						2020
Assets
Operating lease assets			Operating lease right-of-use assets, net			$	130,087					$	115,911
Finance lease assets			Property and equipment, net			338,469						133,175
Total lease assets						$	468,556					$	249,086
Liabilities
Current
Operating			Current operating lease liabilities			$	19,081					$	14,313
Finance			Current maturities of long-term debt and finance lease obligations			16,960						9,767
Noncurrent
Operating			Noncurrent operating lease liabilities			115,067						102,289
Finance			Long-term debt and finance lease obligations			301,532						117,060
Total lease liabilities						$	452,640					$	243,429
Weighted-average remaining lease term
Operating leases						7.7 years						8.3 years
Finance leases						7.8 years						7.6 years
Weighted-average discount rate
Operating leases						5.4		%				5.4		%
Finance leases						5.2		%				5.0		%

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

The table below presents supplemental cash flow information related to leases during the year ended December 31.

			Year Ended December 31,
(in thousands)			2021						2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases			$	18,987					$	13,102
Operating cash flows for finance leases			10,697						5,335
Financing cash flows for finance leases			14,675						15,908

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

The table below indicates the future minimum payments of lease liabilities as of December 31, 2021.

(in thousands)			Operating Leases						Finance Leases
2022			$	25,781					$	32,822
2023			25,618						44,813
2024			25,299						29,268
2025			23,158						29,268
2026			13,184						28,968
Thereafter			49,317						250,141
Total lease payments			162,357						415,280
Less imputed interest			(28,209)						(96,788)
Total lease obligations			134,148						318,492
Less current obligations			(19,081)						(16,960)
Long-term lease obligations			$	115,067					$	301,532

X

- Definition

Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

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X

- Definition

The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-URI http://asc.fasb.org/topic&trid=2208923

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- Definition

Tabular disclosure of supplemental cash flow information for the periods presented.

+ References

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- Definition

Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123406913&loc=d3e41502-112717

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