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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets |  |
Cash and cash equivalents | $ 554,846 | $ 367,342
Restricted cash | 45,522 | 49,295
Marketable securities | 34,529 | 34,728
Accounts receivable, net | 392,746 | 465,779
Prepaid insurance | 10,164 | 10,418
Other current assets | 39,461 | 43,493
Nontrade Receivables | 0 | 3,691
Total current assets | 1,077,268 | 974,746
Property and equipment, net | 216,256 | 147,706
Right-of-use “ROU” leased assets | 60,663 | 56,886
Deposits and prepaid health insurance | 203,231 | 193,013
Goodwill and other intangible assets, net | 12,707 | 12,714
Deferred Income Tax Assets, Net | 9,603 | 3,956
Other assets | 4,548 | 5,975
Total assets | 1,584,276 | 1,394,996
Liabilities and stockholders’ equity |  |
Accounts payable | 6,203 | 4,565
Payroll taxes and other payroll deductions payable | 377,960 | 277,248
Accrued worksite employee payroll cost | 334,836 | 401,859
Accrued health insurance costs | 32,685 | 21,180
Accrued workers’ compensation costs | 48,186 | 52,868
Accrued corporate payroll and commissions | 44,277 | 52,612
Other accrued liabilities | 60,777 | 58,713
Total current liabilities | 904,924 | 869,045
Accrued workers’ compensation costs | 195,239 | 193,609
Long-term debt | 369,400 | 269,400
Operating lease liabilities, net of current | 64,289 | 58,863
Other accrued liabilities, net of current | 6,292 | 0
Total noncurrent liabilities | 635,220 | 521,872
Commitments and contingencies |  |
Stockholders’ equity: |  |
Preferred stock, par value $0.01 per share: Shares authorized - 20,000; Shares issued and outstanding - none | 0 | 0
Common stock, par value $0.01 per share: Shares authorized - 120,000; Shares issued - 55,489 at December 31, 2019 and 2018 | 555 | 555
Additional paid-in capital | 95,528 | 48,141
Treasury stock, at cost (17,236 and 16,117 shares held in treasury) | (626,984) | (544,102)
Accumulated other comprehensive income, net of tax | 5 | 12
Retained earnings | 575,028 | 499,473
Total stockholders’ equity | 44,132 | 4,079
Total liabilities and stockholders’ equity | $ 1,584,276 | $ 1,394,996
Stockholders' Equity, Number of Shares, Par Value and Other Disclosures [Abstract] |  |
Preferred stock, par value (in dollars per share) | $ 0.01 |
Preferred stock, authorized (in shares) | 20,000,000 |
Preferred stock, issued (in shares) | 0 |
Preferred stock, outstanding (in shares) | 0 |
Common stock, par value (in dollars per share) | $ 0.01 |
Common stock, authorized (in shares) | 120,000,000 |
Common stock, issued (in shares) | 55,489,000 |
Treasury stock, shares (in shares) | 17,236,000 | 16,117,000

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