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CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Cash flows from operating activities |  |  |
Net income | $ 151,099 | $ 135,413 | $ 84,402
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 28,723 | 22,842 | 18,182
Amortization of marketable securities | (486) | 137 | 80
Stock-based compensation | 23,993 | 20,425 | 24,345
Deferred income taxes | 4,860 | (4,533) | 9,742
Changes in operating assets and liabilities: |  |  |
Accounts receivable | (65,156) | (66,642) | (63,697)
Prepaid insurance | (2,007) | 2,371 | 4,259
Other current assets | (15,772) | (730) | (7,465)
Other assets | (3,023) | (2,005) | (2,496)
Accounts payable | (6,057) | 4,175 | 2,258
Payroll taxes and other payroll deductions payable | 16,082 | (42,081) | 55,481
Increase (Decrease) in WSEE payroll expense | 71,880 | 62,577 | 52,188
Accrued worksite employee payroll expense | 6,359 | 8,941 | 17,138
Accrued health insurance costs | (13,973) | 9,078 | (285)
Accrued workers’ compensation costs | 13,247 | 23,763 | 23,945
Income taxes payable/receivable | (4,616) | 10,749 | (4,875)
Total adjustments | 54,054 | 49,067 | 128,800
Net cash provided by operating activities | 205,153 | 184,480 | 213,202
Marketable securities: |  |  |
Purchases | (110,131) | (87,887) | (1,752)
Proceeds from maturities | 108,380 | 12,625 | 1,561
Proceeds from dispositions | 28,313 | 16,299 | 0
Property and equipment: |  |  |
Purchases | (56,307) | (35,328) | (33,337)
Proceeds from dispositions | 21 | 151 | 278
Net cash used in investing activities | (29,724) | (94,140) | (33,250)
Cash flows from financing activities |  |  |
Purchase of treasury stock | 203,043 | 113,327 | 38,735
Dividends paid | (48,622) | (33,408) | (65,768)
Borrowings under long-term debt agreement | 125,000 | 40,000 | 0
Other | 8,312 | 2,257 | 1,554
Net cash used in financing activities | (118,353) | (104,478) | (102,949)
Net increase (decrease) in cash and cash equivalents | 57,076 | (14,138) | 77,003
Cash, cash equivalents and restricted cash beginning of year | 535,474 | 549,612 | 472,609
Cash, cash equivalents and restricted cash at end of year | 592,550 | 535,474 | 549,612
Supplemental disclosures of cash flow information |  |  |
Income taxes, net | 38,299 | 40,730 | 40,872
Cash paid for interest | 7,421 | 4,006 | 3,257
ROU assets obtained in exchange for lease obligations | 24,474 | 0 | 0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] |  |  |
Cash and cash equivalents | 367,342 | 326,773 | 354,260
Restricted Cash and Cash Equivalents, Current | 49,295 | 42,227 | 41,137
Deposits workers' compensation | $ 175,913 | $ 166,474 | $ 154,215

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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for purchase of marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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