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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash Flows from Operating Activities: |  |  |  |  |
Net income | $ 157,675 | $ 97,201 |  | $ 97,650 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |
Depreciation and amortization | 58,604 | 62,249 |  | 51,569 |
Provision for Doubtful Accounts | 12,050 | 10,788 |  | 10,486 |
Provision (benefit) for deferred income taxes | (5,140) | 12,834 |  | 11,549 |
Allocated Share-based Compensation Expense | 24,044 | 27,024 |  | 22,018 |
Workers' Compensation Provision | 2,908 | 2,693 |  | 2,117 |
Write off of Deferred Debt Issuance Cost | 0 | 0 |  | 3,751 |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax | 0 | 0 |  | (25,703) |
Other Noncash Income (Expense) | (6,610) | (5,642) |  | (7,136) |
Changes in operating assets and liabilities: |  |  |  |  |
Accounts receivable | (50,461) | (43,289) |  | (53,775) |
Prepaid expenses and income taxes | (11,861) | 6,433 |  | 100 |
Increase (Decrease) in Income Taxes Payable | 613 | 3,346 |  | (7,679) |
Accounts payable | 315 | (2,236) |  | 1,684 |
Accrued payroll and contract professional pay | 1,040 | 23,556 |  | 242 |
Increase (Decrease) in Workers' Compensation Liabilities | (2,616) | (2,691) |  | (901) |
Payments of earn-outs | 0 | (4,780) |  | 0 |
Other | 2,665 | 561 |  | 3,800 |
Net cash provided by operating activities(1) | 196,446 | 199,331 | [1] | 124,044 | [1]
Cash Flows from Investing Activities: |  |  |  |  |
Cash paid for property and equipment | (24,265) | (27,138) |  | (24,689) |
Cash paid for acquisitions, net of cash acquired | (25,940) | 0 |  | (552,777) |
Proceeds from Divestiture of Businesses, Net of Cash Divested | 0 | 6,000 |  | 115,440 |
Other | 88 | (846) |  | 496 |
Net cash used in investing activities | (50,117) | (21,984) |  | (461,530) |
Cash Flows from Financing Activities: |  |  |  |  |
Principal payments of long-term debt | (105,000) | (129,000) |  | (516,125) |
Proceeds from long-term debt | 37,000 | 11,000 |  | 875,000 |
Proceeds from option exercises and employee stock purchase plan | 7,755 | 9,758 |  | 6,591 |
Payment of employment taxes related to release of restricted stock awards | (14,886) | (7,024) |  | (8,823) |
Repurchase of common stock | (60,065) | (41,096) |  | (1,645) |
Debt issuance or amendment costs | (3,273) | (889) |  | (23,890) |
Payments of Merger Related Costs, Financing Activities | 0 | 16,814 |  | 0 |
Net cash provided by (used in) financing activities(1) | (138,469) | (174,065) | [1] | 331,108 | [1]
Effect of exchange rate changes on cash and cash equivalents | 1,763 | (107) |  | (1,467) |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect | 9,623 | 3,175 |  | (7,845) |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 27,044 | 23,869 |  | 31,714 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 36,667 | 27,044 |  | 23,869 |
Deferred Compensation Plan Assets | 2,200 |  |  |  |
Supplemental Disclosure of Cash Flow Information |  |  |  |  |
Income taxes | 55,326 | 38,190 |  | 45,478 |
Interest | 24,074 | 26,829 |  | 22,282 |
Non-Cash Investing and Financing Activities: |  |  |  |  |
Equity consideration for acquisition | 0 | 0 |  | 30,183 |
Proceeds from Stock Options Exercised | 0 | 0 |  | 2,174 |
Acquisition of property and equipment through accounts payable | 2,313 | 438 |  | 989 |
Unsettled repurchases of common stock | $ 0 | $ 1,995 |  | $ 0 |
[1] | Effective January 1, 2017, the Company adopted ASU No. 2016-09, Compensation - Stock Compensation (Topic 718). The Company elected to present retrospectively its gross excess tax benefits as cash flows from operating activities in the consolidated statements of cash flows for all periods presented, which increased cash flows from operating activities and decreased cash flows from financing activities by $3.1 million and $6.6 million for the years ended December 31, 2016 and 2015 respectively, see “Note 2. Accounting Standards Update”.

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- Definition Amount of cash outflow for taxes classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow for loan and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow for financing costs associated with business combinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition This element represents the cash inflow during the period from the sale of a component of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The fair value of stock issued in noncash financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 + Details
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- References No definition available. + Details
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- Definition Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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