OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING SEGMENTS
Operating Revenues	$ 1,126,769	$ 1,075,739	$ 1,049,620
Aircraft Fuel	213,480	237,160	246,669
Salaries, Wages, and Benefits	372,597	326,775	295,640
Aircraft Rent	0	0	2,281
Maintenance	80,349	68,770	60,588
Sales and Marketing	33,300	34,935	34,105
Depreciation and Amortization	98,878	94,989	88,151
Ground Handling	44,701	42,118	37,506
Landing Fees and Airport Rent	64,761	59,549	49,615
Special Items, net	1,886	0	0
Other Operating, net	116,244	105,457	107,565
Total Operating Expenses	1,026,196	969,753	922,120
Operating Income	100,573	105,986	127,500
Interest Income	6,973	7,833	10,180
Interest Expense	(36,861)	(44,300)	(42,634)
Other, net	(474)	55	(887)
Income before Income Tax	70,211	69,574	94,159
Passenger
OPERATING SEGMENTS
Operating Revenues	971,742	968,565	949,885
Aircraft Fuel	213,109	237,108	246,600
Salaries, Wages, and Benefits	272,841	255,887	225,744
Aircraft Rent			2,281
Maintenance	59,124	54,619	46,211
Sales and Marketing	33,300	34,935	34,105
Depreciation and Amortization	98,860	94,971	88,098
Ground Handling	44,691	42,102	37,506
Landing Fees and Airport Rent	64,029	58,951	49,175
Special Items, net	1,886
Other Operating, net	86,839	85,199	87,293
Total Operating Expenses	874,679	863,772	817,013
Operating Income	97,063	104,793	132,872
Cargo
OPERATING SEGMENTS
Operating Revenues	155,027	107,174	99,735
Aircraft Fuel	371	52	69
Salaries, Wages, and Benefits	99,756	70,888	69,896
Aircraft Rent			0
Maintenance	21,225	14,151	14,377
Sales and Marketing	0	0	0
Depreciation and Amortization	18	18	53
Ground Handling	10	16	0
Landing Fees and Airport Rent	732	598	440
Special Items, net	0
Other Operating, net	29,405	20,258	20,272
Total Operating Expenses	151,517	105,981	105,107
Operating Income	$ 3,510	$ 1,193	$ (5,372)