CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Accounts receivable, allowance for credit losses		$ 34,441	$ 28,560
PROPERTY, EQUIPMENT AND FACILITIES - accumulated depreciation and amortization	[1]	140,161	146,367
OTHER ASSETS:
Noncurrent receivables, allowance for credit losses		$ 19,370	$ 6,810
STOCKHOLDERS' EQUITY:
Common stock, par value (in dollars per share)		$ 0	$ 0
Common stock, shares authorized (in shares)		100,000,000	100,000,000
Common stock, shares issued (in shares)		31,359,110	31,147,925
Common stock, shares outstanding (in shares)		31,359,110	31,147,925
Series A Convertible Preferred Stock [Member]
SERIES A CONVERTIBLE PREFERRED STOCK
Preferred stock, par value (in dollars per share)		$ 0	$ 0
Preferred stock, shares authorized (in shares)		10,000,000	10,000,000

[1] Includes net impairment charge of $0.4 million as of December 31, 2022