BASIS OF PRESENTATION -Revision of Previously Issued Consolidated Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]
Total Property & Equipment	$ 948,638						$ 948,638		$ 695,587
Total Property & Equipment, net	788,859						788,859		578,518
Deferred Tax Asset	14,734						14,734		17,608
Total Other Assets									426,461
Total Assets	1,521,444						1,521,444		1,380,422
Retained Earnings	14,764						14,764		4,372
Retained Earnings	508,005	$ 495,888	$ 497,069	$ 487,142	$ 469,019	$ 414,322	508,005	$ 487,142	490,589	$ 283,817
Total Liabilities and Stockholders' Equity	1,521,444						1,521,444		1,380,422
Operating Expenses
Depreciation and Amortization	17,181			14,710			49,364	41,532
Special Items, net	0			(65)			0	(72,419)
Total Operating Expenses				152,342				348,756
Operating Income	15,391			21,321			40,592	101,708
Income Before Income Tax	12,930			15,519			14,505	100,778
Income Tax Expense	2,253			2,140			4,113	18,444
Net Income (Loss)	$ 10,677	(3,922)	3,637	$ 13,379	52,177	16,778	$ 10,392	$ 82,334
Basic (in dollars per share)	$ 0.18			$ 0.23			$ 0.18	$ 1.51
Diluted (in dollars per share)	$ 0.18			$ 0.22			$ 0.17	$ 1.40
Stockholder's Equity
Net Income (Loss)	$ 10,677	(3,922)	3,637	$ 13,379	52,177	16,778	$ 10,392	$ 82,334
Total Stockholders' Equity	508,005	495,888	497,069	487,142	469,019	414,322	508,005	487,142	490,589	283,817
Statement of Cash Flows [Abstract]
Net Income (Loss)	10,677	(3,922)	3,637	13,379	52,177	16,778	10,392	82,334
Depreciation and Amortization	17,181			14,710			49,364	41,532
Non-Cash (Gain) Loss on Asset Transaction, Net							(318)	2
Deferred Income Taxes							3,183	18,340
Operating Lease Obligations							(61)	(32,651)
Net Cash Provided by Operating Activities							71,671	116,358
Purchases of Property & Equipment							(177,658)	(118,016)
Net Cash Used in Investing Activities							(297,610)	(118,390)
Retained Earnings (Deficit)
Balance Sheet Related Disclosures [Abstract]
Retained Earnings	14,764	4,087	8,009	5,458	(7,921)	(60,098)	14,764	5,458	4,372	38,324
Operating Expenses
Net Income (Loss)	10,677	(3,922)	3,637	13,379	52,177	16,778
Stockholder's Equity
Net Income (Loss)	10,677	(3,922)	3,637	13,379	52,177	16,778
Total Stockholders' Equity	14,764	4,087	8,009	5,458	(7,921)	(60,098)	14,764	5,458	4,372	$ 38,324
Statement of Cash Flows [Abstract]
Net Income (Loss)	10,677	$ (3,922)	3,637	13,379	52,177	16,778
Previously Reported
Balance Sheet Related Disclosures [Abstract]
Total Property & Equipment									688,624
Accumulated Depreciation & Amortization									(115,013)
Total Property & Equipment, net									573,611
Deferred Tax Asset									18,737
Total Other Assets									427,590
Total Assets									1,376,644
Retained Earnings									594
Retained Earnings			493,291	482,880	464,233	409,960		482,880	486,811
Total Liabilities and Stockholders' Equity									1,376,644
Operating Expenses
Depreciation and Amortization				14,029				40,103
Special Items, net				(65)				(65,456)
Total Operating Expenses				151,661				354,290
Operating Income				22,002				96,174
Income Before Income Tax				16,200				95,244
Income Tax Expense				2,297				17,172
Net Income (Loss)				$ 13,903	51,753	12,416		$ 78,072
Basic (in dollars per share)				$ 0.24				$ 1.44
Diluted (in dollars per share)				$ 0.23				$ 1.33
Stockholder's Equity
Net Income (Loss)				$ 13,903	51,753	12,416		$ 78,072
Total Stockholders' Equity			493,291	482,880	464,233	409,960		482,880	486,811
Statement of Cash Flows [Abstract]
Net Income (Loss)				13,903	51,753	12,416		78,072
Depreciation and Amortization				14,029				40,103
Non-Cash (Gain) Loss on Asset Transaction, Net								(12,666)
Deferred Income Taxes								17,068
Operating Lease Obligations								(19,983)
Net Cash Provided by Operating Activities								109,395
Purchases of Property & Equipment								(111,053)
Net Cash Used in Investing Activities								(111,427)
Previously Reported | Retained Earnings (Deficit)
Balance Sheet Related Disclosures [Abstract]
Retained Earnings			4,231	1,196	(12,707)	(64,460)		1,196
Stockholder's Equity
Total Stockholders' Equity			4,231	1,196	(12,707)	(64,460)		1,196
Revision of Prior Period, Error Correction, Adjustment
Balance Sheet Related Disclosures [Abstract]
Total Property & Equipment									6,963
Accumulated Depreciation & Amortization									(2,056)
Total Property & Equipment, net									4,907
Deferred Tax Asset									(1,129)
Total Other Assets									(1,129)
Total Assets									3,778
Retained Earnings									3,778
Retained Earnings			3,778	4,262	4,786	4,362		4,262	3,778
Total Liabilities and Stockholders' Equity									3,778
Operating Expenses
Depreciation and Amortization				681				1,429
Special Items, net				0				(6,963)
Total Operating Expenses				681				(5,534)
Operating Income				(681)				5,534
Income Before Income Tax				(681)				5,534
Income Tax Expense				(157)				1,272
Net Income (Loss)				$ (524)	424	4,362		$ 4,262
Basic (in dollars per share)				$ (0.01)				$ 0.07
Diluted (in dollars per share)				$ (0.01)				$ 0.07
Stockholder's Equity
Net Income (Loss)				$ (524)	424	4,362		$ 4,262
Total Stockholders' Equity			3,778	4,262	4,786	4,362		4,262	3,778
Statement of Cash Flows [Abstract]
Net Income (Loss)				(524)	424	4,362		4,262
Depreciation and Amortization				681				1,429
Non-Cash (Gain) Loss on Asset Transaction, Net								12,668
Deferred Income Taxes								1,272
Operating Lease Obligations								(12,668)
Net Cash Provided by Operating Activities								6,963
Purchases of Property & Equipment								(6,963)
Net Cash Used in Investing Activities								(6,963)
Revision of Prior Period, Error Correction, Adjustment | Retained Earnings (Deficit)
Balance Sheet Related Disclosures [Abstract]
Retained Earnings			3,778	4,262	4,786	4,362		4,262
Stockholder's Equity
Total Stockholders' Equity			$ 3,778	$ 4,262	$ 4,786	$ 4,362		$ 4,262
Aircraft and Flight Equipment
Balance Sheet Related Disclosures [Abstract]
Aircraft and Flight Equipment	$ 628,375						$ 628,375		447,319
Aircraft and Flight Equipment | Previously Reported
Balance Sheet Related Disclosures [Abstract]
Aircraft and Flight Equipment									440,356
Aircraft and Flight Equipment | Revision of Prior Period, Error Correction, Adjustment
Balance Sheet Related Disclosures [Abstract]
Aircraft and Flight Equipment									$ 6,963