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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 636,899 $ 449,511
Marketable securities, short-term 98,460 272,031
Accounts receivable, net of allowance for doubtful accounts of $2,378 and $5,814, respectively 439,009 324,189
Inventories 55,641 31,688
Prepaid expenses and other current assets 72,470 80,948
Total current assets 1,302,479 1,158,367
Marketable securities, long-term 9,112 39,948
Property, plant and equipment, net 521,329 348,793
Equity method investments 45,913 54,606
Goodwill and intangible assets, net 81,949 89,068
Deferred tax assets 64,689 49,334
Other assets 26,987 43,893
Total assets 2,052,458 1,784,009
Current liabilities:    
Accounts payable 64,256 36,776
Accrued liabilities 234,679 195,562
Deferred revenues 393,138 267,713
Total current liabilities 692,073 500,051
Income tax payable 78,008 114,091
Other long-term liabilities 29,486 15,579
Total liabilities 799,567 629,721
Commitments and contingencies (Notes 8 and 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued) 0 0
Common stock, $0.0001 par value (200,000 shares authorized; 79,778 and 80,040 issued and outstanding, respectively) 8 8
Additional paid-in capital 877,514 886,435
Accumulated other comprehensive income (loss), net (2,774) 571
Retained earnings 378,143 267,274
Total stockholders’ equity 1,252,891 1,154,288
Total liabilities and stockholders’ equity $ 2,052,458 $ 1,784,009