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Consolidated Statements Of Cash Flows (USD $)
In Thousands
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Cash flows from operating activities:  
Net income$ 14,409$ 4,225
Reconciliations of net income to net cash provided by operating activities:  
Depreciation and amortization1,0001,051
Gains recognized on marketable securities(99)(399)
Gain recognized on sale and leaseback(92)(92)
Deferred income taxes16636
Share based compensation332137
Changes in certain assets and liabilities, net of amounts purchased in acquisitions:  
Trade accounts receivable, net(13,274)(23,413)
Income taxes receivable0208
Prepaid expenses and other(10)(793)
Accounts payable342(75)
Accrued payroll, payroll taxes and related benefits15,16422,044
Other accrued liabilities160(254)
Income taxes payable1,5170
Workers' compensation claims liabilities4,2092,528
Safety incentives liability836316
Customer deposits, long-term liabilities and other assets, net11520
Net cash provided by operating activities24,7755,539
Cash flows from investing activities:  
Cash paid for acquisitions0(375)
Purchase of property and equipment, net of amounts purchased in acquisitions(836)(1,158)
Proceeds from sales and maturities of marketable securities55,59010,569
Purchase of marketable securities(60,745)(23,769)
Proceeds from maturities of restricted marketable securities5,9423,772
Purchase of restricted marketable securities(6,876)(7,099)
Net cash used in investing activities(6,925)(18,060)
Cash flows from financing activities:  
Proceeds from exercise of stock options54
Dividends paid(2,748)(2,484)
Repurchase of common stock(3,827)(3,415)
Tax benefit of stock option exercises136
Net cash used in financing activities(6,557)(5,889)
Net increase (decrease) in cash and cash equivalents11,293(18,410)
Cash and cash equivalents, beginning of period30,92436,671
Cash and cash equivalents, end of period42,21718,261
Supplemental schedule of noncash investing activities:  
Cost of acquisitions in excess of fair value of net assets acquired0357
Intangible assets acquired015
Tangible assets acquired03
Net cash paid for acquisitions$ 0$ 375