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Consolidated Statements of Cash Flows
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Statement of Cash Flows [Abstract]      
Consolidated net income (loss) $ 389,037 $ 46,171 $ (134,720)
(Income) loss from discontinued operations, net of income taxes (217,246) 48,956 71,812
Adjustments to reconcile consolidated net income (loss) to net cash provided by (used in) operating activities:      
Depreciation and amortization 18,564 21,776 25,515
Non-cash operating lease cost 5,021 4,971 5,085
Stock-based compensation to employees and directors 11,133 7,841 16,160
(Increase)/decrease in deferred income taxes, net (53,829) 35 972
Income from equity method securities (12,585) 0 0
Other non-cash adjustments 1,537 (542) 78
Changes in operating assets and liabilities:      
Accounts receivable, net 1,677 (6,715) 16,786
Inventories 1,106 (403) 8,268
Prepaids and other current assets 2,958 (5,358) 5,601
Other long-term assets, net (1,755) (264) (664)
Accounts payable (7,787) 34,428 (26,752)
Accrued liabilities (21,595) 48,907 (7,055)
Unearned revenue (12,778) 31,049 (9,337)
Operating lease liabilities (5,261) (5,995) (7,008)
Other long-term liabilities (150) 1,769 416
Net cash provided by (used in) continuing operating activities 98,047 226,626 (34,843)
Net cash used in discontinued operating activities (17,128) (30,152) (46,769)
Net cash provided by (used in) operating activities 80,919 196,474 (81,612)
Cash flows from investing activities:      
Contributions for capital calls (41,122) 0 0
Expenditures for property and equipment (13,617) (14,874) (12,835)
Other investing activities, net (1,694) (397) 34
Net cash used in continuing investing activities (56,433) (15,271) (12,801)
Net cash used in discontinued investing activities (29,703) (8,284) (14,051)
Net cash used in investing activities (86,136) (23,555) (26,852)
Cash flows from financing activities:      
Payments on long-term debt (3,030) (2,635) (3,141)
Proceeds from long-term debt 0 47,500 0
Proceeds from sale of common stock, net of offering costs 0 195,540 82,954
Payments of taxes withheld upon vesting of restricted stock (8,279) (2,592) (1,407)
Other financing activities, net (1,374) (6,449) 2,927
Net cash provided by (used in) continuing financing activities (12,683) 231,364 81,333
Net cash provided by (used in) discontinued financing activities 2,085 0 (785)
Net cash provided by (used in) financing activities (10,598) 231,364 80,548
Net increase (decrease) in cash, cash equivalents, and restricted cash (15,815) 404,283 (27,916)
Cash, cash equivalents, and restricted cash, beginning of year, inclusive of cash balances of discontinued operations 519,181 114,898 142,814
Cash, cash equivalents, and restricted cash, end of year, inclusive of cash balances of discontinued operations 503,366 519,181 114,898
Less: Cash, cash equivalents, and restricted cash of discontinued operations 0 22,559 16,948
Cash, cash equivalents, and restricted cash, end of year $ 503,366 $ 496,622 $ 97,950