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v3.10.0.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Cash flows from operating activities: |  |
Net income | $ 51,972 | $ 68,040
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 7,022 | 6,342
Bad debt provision | 42,387 | 4,000
Stock-based compensation expense (benefit), net of tax impact from equity compensation plans | 3,407 | (632)
Amortization of premium on marketable securities | 1,007 | 929
Unrealized gain on deferred compensation fund investments | (3,071) | (3,351)
Changes in operating assets and liabilities: |  |
Accounts and notes receivable | (49,873) | (103,697)
Inventories and supplies | 798 | (997)
Prepaid expenses and other assets | 725 | (11,658)
Deferred compensation funding | (1,141) | 83
Accounts payable and other accrued expenses | 55 | (1,102)
Accrued payroll, accrued and withheld payroll taxes | 23,202 | 28,575
Income taxes payable | (14,514) | 7,865
Accrued insurance claims | 8,249 | 4,992
Deferred compensation liability | 4,284 | 3,733
Net cash provided by operating activities | 74,509 | 3,122
Cash flows from investing activities: |  |
Disposals of fixed assets | 481 | 264
Additions to property and equipment | (3,739) | (3,962)
Purchases of marketable securities | (13,069) | (22,149)
Sales of marketable securities | 8,706 | 20,354
Cash paid for acquisitions | 0 | (4,584)
Net cash used in investing activities | (7,621) | (10,077)
Cash flows from financing activities: |  |
Dividends paid | (42,748) | (41,302)
Reissuance of treasury stock pursuant to Dividend Reinvestment Plan | 68 | 71
Proceeds from the exercise of stock options | 6,855 | 10,338
Net (repayments) proceeds from short-term borrowings | (25,423) | 25,000
Net cash used in financing activities | (61,248) | (5,893)
Net change in cash and cash equivalents | 5,640 | (12,848)
Cash and cash equivalents at beginning of the period | 9,557 | 23,853
Cash and cash equivalents at end of the period | $ 15,197 | $ 11,005

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