| Dec 31,
2011 | Dec 31,
2012 | Dec 31,
2013 | Dec 31,
2014 | Dec 31,
2015 | Dec 31,
2016 | Dec 31,
2017 | Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
|---|
| Net income | 18 | 34 | 35 | 37 | 27 | 21 | 21 | 31 | 38 | 59 | 85 | 83 | 91 | 30 |
|---|
| Depreciation | 19 | 25 | 29 | 33 | 37 | 38 | 38 | 38 | 41 | 43 | 44 | 49 | 54 | 60 |
|---|
| Amortization of intangible assets | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 2 | 4 | 4 | 2 | 9 | 5 | 5 |
|---|
| Stock-based compensation expense | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 4 | 6 | 7 | 8 | 8 | 9 |
|---|
| Deferred income taxes | - | - | - | - | - | - | - | 4 | 4 | -3 | 6 | 10 | 2 | -0 |
|---|
| Gain on sale of property and equipment | 1 | 1 | 1 | 0 | 2 | 1 | 4 | 4 | 4 | 3 | 3 | 2 | 4 | 7 |
|---|
| Other non-cash items | - | - | - | - | - | -0 | -1 | -0 | -1 | -2 | -2 | -2 | -0 | -1 |
|---|
| Accounts receivable, net | 20 | 40 | 6 | -16 | 18 | 27 | 46 | 16 | 40 | -3 | -11 | 87 | 49 | 134 |
|---|
| Contract assets, net | - | - | - | - | - | - | - | 28 | 16 | -31 | 39 | 64 | 119 | -115 |
|---|
| Receivable for insurance claims in excess of deductibles | 2 | 1 | 0 | 1 | -1 | 7 | 0 | 9 | 10 | 2 | 5 | 0 | -2 | 2 |
|---|
| Prepaid expenses and other assets | -4 | 2 | 2 | 1 | 6 | -4 | 2 | -2 | 10 | 15 | 25 | -2 | -1 | -10 |
|---|
| Accounts payable | 35 | 11 | -5 | -17 | 7 | 17 | 8 | 20 | 22 | -43 | 34 | 109 | 37 | -61 |
|---|
| Contract liabilities | - | - | - | - | - | - | - | 23 | 28 | 53 | 10 | 58 | 13 | 83 |
|---|
| Accrued self-insurance | 5 | 1 | -0 | 0 | -3 | 6 | 3 | 9 | 13 | 3 | 5 | 5 | 0 | -1 |
|---|
| Other liabilities | 11 | 4 | 0 | -1 | -5 | 12 | -7 | 10 | -9 | 38 | 3 | -14 | 30 | -21 |
|---|
| Net cash flows provided by operating activities | - | - | - | - | - | - | -9 | 85 | 65 | 175 | 137 | 167 | 71 | 87 |
|---|
| Proceeds from sale of property and equipment | 1 | 1 | 1 | 0 | 3 | 3 | 4 | 5 | 4 | 3 | 3 | 2 | 6 | 9 |
|---|
| Cash paid for acquisitions, net of cash acquired | - | - | - | - | 13 | 12 | - | - | - | - | - | 111 | - | - |
|---|
| Purchases of property and equipment | 42 | 37 | 43 | 39 | 47 | 25 | 31 | 51 | 58 | 44 | 52 | 77 | 85 | 76 |
|---|
| Net cash flows used in investing activities | - | - | - | - | - | - | -27 | -93 | -133 | -41 | -49 | -186 | -79 | -67 |
|---|
| Proceeds from Lines of Credit | - | - | - | - | - | - | - | - | - | - | - | - | 563 | 822 |
|---|
| Repayments under revolving lines of credit | - | - | - | - | - | - | - | - | - | - | - | - | 563 | 777 |
|---|
| Payment of principal obligations under equipment notes | - | - | - | - | - | - | - | - | 5 | 33 | 25 | 1 | 5 | 7 |
|---|
| Payment of principal obligations under finance leases | - | - | - | - | - | - | - | - | 1 | 1 | 0 | 2 | 1 | 1 |
|---|
| Proceeds from Notes Payable | - | - | - | - | - | - | - | 31 | 35 | - | - | 24 | - | - |
|---|
| Proceeds from Stock Options Exercised | 1 | 1 | - | 1 | 2 | 6 | 1 | 2 | 0 | 1 | 0 | 0 | 0 | - |
|---|
| Debt refinancing costs | - | - | - | - | - | - | - | - | 1 | - | - | - | 2 | 0 |
|---|
| Repurchase of common stock | - | - | - | 16 | 28 | 101 | 3 | 1 | 1 | 1 | 3 | 37 | 3 | 75 |
|---|
| Payments related to tax withholding for stock-based compensation | 0 | - | - | - | - | - | - | - | - | - | - | 7 | 8 | 6 |
|---|
| Other financing activities | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 | - | - | 4 |
|---|
| Net cash flows used in financing activities | - | - | - | - | - | - | 17 | 11 | 73 | -124 | -28 | -9 | -18 | -40 |
|---|
| Effect of exchange rate changes on cash | - | - | - | - | - | - | - | - | - | - | - | -4 | 0 | -1 |
|---|
| Net decrease in cash and cash equivalents | - | - | - | - | - | - | - | - | 5 | 10 | 59 | -31 | -26 | -21 |
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| Income Taxes Paid | - | - | - | - | - | - | - | 7 | 13 | 24 | 30 | 20 | 24 | 15 |
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| Interest payments | - | - | - | - | - | - | 2 | 3 | 6 | 4 | 1 | 3 | 4 | 6 |
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| Capital Expenditures Incurred but Not yet Paid | - | - | - | - | 1 | 1 | 2 | 1 | 0 | 0 | 4 | 2 | 8 | 3 |
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