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CONSOLIDATED BALANCE SHEETS - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 286,034,000 | $ 269,538,000
Restricted cash | 42,637,000 | 37,418,000
Marketable securities | 1,851,000 | 9,875,000
Accounts receivable, net: |  |
Trade | 13,107,000 | 7,691,000
Unbilled | 254,999,000 | 190,715,000
Other | 2,178,000 | 2,259,000
Prepaid insurance | 15,041,000 | 7,417,000
Other current assets | 19,526,000 | 17,135,000
Income Taxes Receivable, Current | 4,949,000 | 0
Total current assets | 640,322,000 | 542,048,000
Property and equipment: |  |
Land | 5,214,000 | 5,214,000
Buildings and improvements | 90,151,000 | 70,273,000
Computer hardware and software | 97,311,000 | 90,654,000
Software development costs | 51,956,000 | 45,762,000
Furniture, fixtures and other | 38,483,000 | 39,919,000
Total property and equipment, gross | 283,115,000 | 251,822,000
Accumulated depreciation and amortization | (202,854,000) | (190,063,000)
Total property and equipment, net | 80,261,000 | 61,759,000
Other assets: |  |
Prepaid health insurance | 9,000,000 | 9,000,000
Deposits – health insurance | 4,700,000 | 3,700,000
Deposits – workers’ compensation | 143,938,000 | 136,462,000
Goodwill and other intangible assets, net | 13,088,000 | 13,588,000
Deferred income taxes, net | 14,025,000 | 16,976,000
Other assets | 1,840,000 | 1,379,000
Total other assets | 186,591,000 | 181,105,000
Total assets | 907,174,000 | 784,912,000
Current liabilities: |  |
Accounts payable | 4,189,000 | 5,381,000
Payroll taxes and other payroll deductions payable | 247,766,000 | 205,393,000
Accrued worksite employee payroll cost | 215,214,000 | 161,917,000
Accrued health insurance costs | 26,360,000 | 13,643,000
Accrued workers’ compensation costs | 44,231,000 | 39,053,000
Accrued corporate payroll and commissions | 40,761,000 | 39,103,000
Other accrued liabilities | 22,437,000 | 20,250,000
Income tax payable | 0 | 2,971,000
Total current liabilities | 600,958,000 | 487,711,000
Noncurrent liabilities: |  |
Accrued workers’ compensation costs | 141,291,000 | 124,746,000
Long-term debt | 104,400,000 | 0
Total noncurrent liabilities | 245,691,000 | 124,746,000
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 - 60,000 Shares issued - 27,744 and 30,758 at December 31, 2016 and December 31, 2015, respectively | 277,000 | 308,000
Additional paid-in capital | 9,240,000 | 144,701,000
Treasury stock, at cost – 6,719 and 6,493 at December 31, 2016 and 2015, respectively | (227,152,000) | (205,325,000)
Accumulated other comprehensive income, net of tax | (3,000) | 0
Retained earnings | 278,163,000 | 232,771,000
Total stockholders’ equity | 60,525,000 | 172,455,000
Total liabilities and stockholders’ equity | $ 907,174,000 | $ 784,912,000

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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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