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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Cash flows from operating activities: |  |
Net income | $ 14,954 | $ 8,578
Adjustments to reconcile net income to net cash (used in) provided by operating activities: |  |
Depreciation and amortization | 1,352 | 1,248
Bad debt provision | 450 | 750
Deferred income tax (benefits) | 305 | (1,001)
Stock-based compensation expense | 583 | 560
Amortization of premium on marketable securities | 154 | 198
Unrealized loss on marketable securities | 0 | 56
Unrealized gain on deferred compensation fund investments | (789) | (1,297)
Changes in operating assets and liabilities: |  |
Accounts and notes receivable | (10,695) | (831)
Prepaid income taxes | (1,628) | 405
Inventories and supplies | 79 | (822)
Deferred compensation funding | (1,423) | (464)
Accounts payable and other accrued expenses | 7,670 | 11,338
Accrued payroll, accrued and withheld payroll taxes | (15,282) | (12,516)
Accrued insurance claims | 19 | 1,601
Deferred compensation liability | 2,312 | 1,952
Income taxes payable | (1,906) | 2,655
Prepaid expenses and other assets | (1,182) | (2,969)
Net cash (used in) provided by operating activities | (5,027) | 9,441
Cash flows from investing activities: |  |
Disposals of fixed assets | 164 | 0
Additions to property and equipment | (968) | (813)
Purchases of marketable securities | (1,537) | (1,223)
Sales of marketable securities | 185 | 10,895
Net cash (used in) provided by investing activities | (2,156) | 8,859
Cash flows from financing activities: |  |
Dividends paid | (11,415) | (10,847)
Reissuance of treasury stock pursuant to Dividend Reinvestment Plan | 27 | 30
Tax benefit from equity compensation plans | 709 | 294
Proceeds from the exercise of stock options | 3,640 | 1,840
Net cash used in financing activities | (7,039) | (8,683)
Net (decrease) increase in cash and cash equivalents | (14,222) | 9,617
Cash and cash equivalents at beginning of the period | 68,949 | 38,639
Cash and cash equivalents at end of the period | 54,727 | 48,256
Supplementary Cash Flow Information: |  |
Income taxes cash payments, net of refunds | 6,523 | 2,852
Issuance of Common Stock in 2013 and 2012, respectively, pursuant to Employee Stock Plans | $ 1,842 | $ 1,250

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