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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Cash Flows from Operating Activities: |  |  |
Net income | $ 97,650 | $ 77,184 | $ 84,512
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax | (25,703) | 0 | (30,840)
Depreciation and amortization | 51,569 | 38,296 | 29,882
Provision for Doubtful Accounts | 10,486 | 7,047 | 1,787
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Provision for deferred income taxes | 11,549 | 15,948 | 4,111
Allocated Share-based Compensation Expense | 22,018 | 16,199 | 14,411
Write off of Deferred Debt Issuance Cost | 3,751 | 0 | 14,958
Gross excess tax benefits from stock-based compensation | (6,551) | (4,943) | (5,308)
Workers’ compensation and medical malpractice provision | 2,117 | 3,321 | 5,956
Other Noncash Income (Expense) | (7,136) | (1,408) | 1,853
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures: |  |  |
Accounts receivable | (53,775) | (45,361) | (20,155)
Prepaid expenses and income taxes | 100 | (8,304) | 6,628
Increase (Decrease) in Income Taxes Payable | (7,679) | (8,023) | (5,759)
Accounts payable | 1,684 | (1,693) | (1,580)
Accrued payroll and contract professional pay | 242 | 11,275 | 17,554
Increase (Decrease) in Workers' Compensation Liabilities | (901) | (2,192) | (2,348)
Deferred compensation | 0 | (20) | (9,980)
Other | 3,800 | (4,120) | 8,548
Net cash provided by operating activities | 117,493 | 96,022 | 110,524
Cash Flows from Investing Activities: |  |  |
Cash paid for property and equipment | (24,689) | (19,729) | (16,531)
Cash paid for acquisitions, net of cash acquired | (552,777) | 0 | (110,700)
Proceeds from Divestiture of Businesses, Net of Cash Divested | 115,440 | 0 | 59,899
Other | 496 | 169 | (1,023)
Net cash used in investing activities | (461,530) | (19,560) | (68,355)
Cash Flows from Financing Activities: |  |  |
Principal payments of long-term debt | (516,125) | (148,688) | (456,275)
Proceeds from long-term debt | 875,000 | 164,000 | 429,500
Proceeds from option exercises and employee stock purchase plan | 6,591 | 6,358 | 7,054
Payment of employment taxes related to release of restricted stock awards | (8,823) | (6,498) | (7,600)
Gross excess tax benefits from stock-based compensation | 6,551 | 4,943 | 5,308
Repurchase of common stock | (1,645) | (100,049) | 0
Debt issuance or amendment costs | (23,890) | (467) | (6,938)
Payments of accrued earn-outs | 0 | (691) | (3,425)
Other | 0 | 0 | (14)
Net cash provided by (used in) financing activities | 337,659 | (81,092) | (32,390)
Effect of exchange rate changes on cash and cash equivalents | (1,467) | (1,006) | 92
Net Increase (Decrease) in Cash and Cash Equivalents | (7,845) | (5,636) | 9,871
Cash and Cash Equivalents at Beginning of Year (1) | 31,714 | 37,350 | 27,479
Cash and Cash Equivalents at End of Year (1) | 23,869 | 31,714 | 37,350
Supplemental Disclosure of Cash Flow Information |  |  |
Income taxes | 45,478 | 56,320 | 32,350
Interest | 22,282 | 11,559 | 15,158
Non-Cash Investing and Financing Activities: |  |  |
Equity consideration for acquisition | 30,183 | 0 | 0
Proceeds from Stock Options Exercised | 2,174 | 0 | 0
Acquisition of property and equipment through accounts payable | $ 989 | $ 2,932 | $ 594

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
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- Definition The cash outflow associated with other payments to acquire businesses including deposit on pending acquisitions and preacquisition costs. + 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=56944662&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The amount of cash paid during the current period for taxes other than income taxes. + 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=56944662&loc=d3e3536-108585 + 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=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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=56944662&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + 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 -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: 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=56944662&loc=d3e3213-108585 + Details
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