Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 116,126	$ 130,464
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment	2,468	8,715
Gain on sale of asset		(22,086)
Depreciation and amortization expense	9,138	13,438
Bad debt expense	21,364	26,519
Compensation expense related to share-based awards	7,385	6,651
Deferred income taxes	794	4,249
Changes in operating assets and liabilities	(13,280)	(69,117)
Net cash provided by operating activities	143,995	98,833
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(266,842)	(205,529)
Sales of available-for-sale investments	277,111	179,139
Purchases of property and equipment	(2,997)	(4,801)
Net cash provided by (used in) investing activities	7,272	(31,191)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	2,170	749
Purchase of treasury stock	(6,769)	(2,729)
Payments of employee tax associated with stock compensation	(3,435)	(2,209)
Payments of cash dividends and dividend equivalents	(23,156)	(7,222)
Release of cash held in escrow	(276)	(1,000)
Net cash used in financing activities	(31,466)	(12,411)
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	119,801	55,231
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of the period	119,021	118,884
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of the period	$ 238,822	$ 174,115