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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Cash Flows from Operating Activities: |  |
Net income | $ 29,092 | $ 22,391
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 14,413 | 14,475
Stock-based compensation | 4,891 | 5,570
Provision for accounts receivable allowances | 483 | 2,807
Workers’ compensation provision | 813 | 645
Other | 1,236 | 2,990
Changes in operating assets and liabilities: |  |
Accounts receivable | (13,526) | (10,154)
Prepaid expenses and income taxes | 8,218 | (457)
Accounts payable | 5,825 | 712
Accrued payroll and contract professional pay | 6,473 | 144
Income taxes payable | (448) | 11,226
Workers’ compensation loss reserves | (747) | (493)
Other | (1,990) | (6,056)
Net Cash Provided by Operating Activities | 54,733 | 43,800
Cash Flows from Investing Activities: |  |
Cash paid for property and equipment | (6,198) | (6,792)
Other | (20) | 17
Net cash used in investing activities | (6,218) | (6,775)
Cash Flows from Financing Activities: |  |
Principal payments of long-term debt | (10,000) | (26,000)
Proceeds from long-term debt | 0 | 2,000
Payments of Debt Issuance Costs | 0 | 2,403
Proceeds from option exercises and employee stock purchase plan | 4,388 | 4,106
Payment of employment taxes related to release of restricted stock awards | (2,055) | (5,782)
Repurchase of common stock | 0 | (12,136)
Net Cash Used in Financing Activities | (7,667) | (40,215)
Effect of exchange rate changes on cash and cash equivalents | 385 | 151
Net Increase (Decrease) in Cash and Cash Equivalents | 41,233 | (3,039)
Cash and Cash Equivalents at Beginning of Year | 36,667 | 27,044
Cash and Cash Equivalents at End of Period | 77,900 | 24,005
Supplemental Disclosure of Cash Flow Information: |  |
Income taxes | 1,145 | 936
Interest | 5,329 | 7,492
Supplemental Disclosure of Non-Cash Transactions: |  |
Unpaid portion of additions to property and equipment | $ 1,985 | $ 2,332

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X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration