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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 29,106	$ 24,791
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment	612
Depreciation and amortization expense	2,639	2,233
Bad debt expense	12,862	11,709
Compensation expense related to share-based awards	3,212	1,369
Deferred income taxes	9,468	6,778
Changes in operating assets and liabilities	(9,131)	(33,935)
Net cash provided by operating activities	48,768	12,945
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale investments	(111,753)	(138,700)
Sales of available-for-sale investments	52,893	135,062
Purchases of property and equipment	(1,015)	(479)
Business acquisition	(38,065)
Net cash used in investing activities	(97,940)	(4,117)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock	413	109
Purchase of treasury stock	(17,309)
Payments of employee tax associated with stock compensation	(687)	(2,532)
Net cash used in financing activities	(17,583)	(2,423)
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(66,755)	6,405
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of the period	108,687	32,731
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of the period	$ 41,932	$ 39,136

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