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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 109,637 $ 124,264 $ 69,982
Adjustments to reconcile net income to net      
Asset impairment   612  
Depreciation and amortization expense 16,766 14,786 9,145
Bad debt expense 44,344 47,556 43,454
Compensation expense related to share-based awards 14,972 13,379 9,274
Loss on disposition of asset     14
Deferred income taxes 15,330 20,353 21,556
Changes in operating assets and liabilities:      
Student receivables, gross 6,631 7,092 (33,697)
Allowance for credit losses (47,417) (39,546) (36,326)
Receivables, other 5,396 (99) 1,189
Inventories, prepaid expenses, and other current assets 3,285 3,031 (1,180)
Other non-current assets 72 151 (489)
Accounts payable (2,744) 374 2,320
Accrued expenses and other non-current liabilities (3,404) (11,135) 5,066
Deferred revenue 30,724 5,138 (7,704)
Right of use asset and lease liability (2,476) (6,000) (9,519)
Net cash provided by operating activities 191,116 179,956 73,085
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchases of available-for-sale investments (269,739) (403,673) (449,367)
Sales of available-for-sale investments 391,659 287,249 462,325
Purchases of property and equipment (10,453) (9,768) (5,174)
Business acquisitions, net of cash acquired (57,143) (39,819)  
Other   103 (85)
Net cash provided by (used in) investing activities 54,324 (165,908) 7,699
CASH FLOWS FROM FINANCING ACTIVITIES:      
Purchase of treasury stock (25,296) (17,862) (3,875)
Issuance of common stock 861 5,723 1,774
Payments of employee tax associated with stock compensation (5,511) (912) (2,740)
Net cash used in financing activities (29,946) (13,051) (4,841)
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH, CASH EQUIVALENTS AND RESTRICTED CASH:     13
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH 215,494 997 75,956
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of the year 109,684 108,687 32,731
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of the year 325,178 109,684 108,687
Supplemental Cash Flow Information:      
Income taxes paid 23,224 611 46
Supplemental Non-Cash Disclosures:      
Amount placed in escrow to secure indemnification obligations from business acquisitions 1,210 4,000  
Non-cash additions to property and equipment 2,287 52 $ 38
Right of use assets obtained in exchange for lease liabilities $ 727 $ 552