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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ 55,181 $ (31,897) $ (18,712)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Asset impairment     1,164
Depreciation and amortization expense 9,394 13,990 22,747
Bad debt expense 31,940 27,436 31,885
Compensation expense related to share-based awards 5,614 4,970 3,237
Gain on disposition of property and equipment     (438)
Deferred income taxes 17,863 64,225 (18,087)
Changes in operating assets and liabilities:      
Student receivables, gross (10,541) 5,129 6,925
Allowance for doubtful accounts (29,646) (28,075) (29,033)
Other receivables, net (1,286) (257) 1,127
Inventories, prepaid expenses, and other current assets 3,053 8,742 2,783
Deposits and other non-current assets 711 1,706 1,634
Accounts payable 698 (1,588) (16,264)
Accrued expenses and deferred rent obligations (35,448) (80,703) 29,254
Deferred tuition revenue 9,454 (5,467) (11,747)
Net cash provided by (used in) operating activities 56,987 (21,789) 6,475
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchases of available-for-sale investments (309,784) (256,243) (160,590)
Sales of available-for-sale investments 275,024 250,928 126,830
Purchases of property and equipment [1] (6,732) (6,332) (4,129)
Proceeds on the sale of assets     3,600
Payments of cash upon sale of businesses, net of cash divested     (62)
Net cash used in investing activities (41,492) (11,647) (34,351)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Issuance of common stock 1,682 2,722 773
Payments on borrowings     (38,000)
Payments of employee tax associated with stock compensation (3,345) (1,187) (563)
Net cash (used in) provided by financing activities (1,663) 1,535 (37,790)
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS:   (82) (192)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 13,832 (31,983) (65,858)
CASH AND CASH EQUIVALENTS, beginning of the year 18,899 50,882 116,740
CASH AND CASH EQUIVALENTS, end of the year 32,731 18,899 50,882
Supplemental Cash Flow Information:      
Interest paid     153
Income taxes paid $ 266 $ 120 $ 334
[1] The statement of income (loss) and comprehensive income (loss) balances including revenue, operating income (loss), depreciation and amortization and capital expenditures are presented above on a continuing operations basis. Total assets are presented on a consolidated basis including continuing and discontinued operations.