CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Accounts receivable, allowance for credit losses	$ 31,456	$ 28,560
PROPERTY, EQUIPMENT AND FACILITIES - accumulated depreciation and amortization	147,158	146,367
OTHER ASSETS:
Noncurrent receivables, allowance for credit losses	$ 15,143	$ 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)	31,398,557	31,147,925
Common stock, shares outstanding (in shares)	31,398,557	31,147,925