Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 89,157	$ 57,845
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment	1,335	228
Gain on sale of asset	(22,086)
Depreciation and amortization expense	9,524	9,791
Bad debt expense	18,927	24,379
Compensation expense related to share-based awards	4,315	4,316
Deferred income taxes	2,975	(557)
Changes in operating assets and liabilities	(37,927)	(41,223)
Net cash provided by operating activities	66,220	54,779
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(159,183)	(330,797)
Sales of available-for-sale investments	132,325	134,964
Purchases of property and equipment	(3,612)	(6,765)
Business acquisition		(7,000)
Net cash used in investing activities	(30,470)	(209,598)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	313	849
Purchase of treasury stock	(2,729)	(15,670)
Payments of employee tax associated with stock compensation	(2,209)	(1,612)
Release of cash held in escrow		(3,986)
Net cash used in financing activities	(4,625)	(20,419)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	31,125	(175,238)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of the period	118,884	325,178
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of the period	$ 150,009	$ 149,940