Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 39,442	$ 34,484
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment	1,630	570
Depreciation and amortization expense	3,016	5,155
Bad debt expense	6,556	10,757
Compensation expense related to share-based awards	2,307	2,294
Deferred income taxes	741	304
Changes in operating assets and liabilities	800	(48,992)
Net cash provided by operating activities	54,492	4,572
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(104,558)	(83,777)
Sales of available-for-sale investments	74,955	64,344
Purchases of property and equipment	(1,198)	(1,925)
Net cash used in investing activities	(30,801)	(21,358)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	1,520	247
Purchase of treasury stock	(6,769)	(815)
Payments of employee tax associated with stock compensation	(3,435)	(2,209)
Payments of cash dividends	(7,197)
Net cash used in financing activities	(15,881)	(2,777)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	7,810	(19,563)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of the period	119,021	118,884
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of the period	$ 126,831	$ 99,321