CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Operating Activities
Net income	$ 41,293	$ 2,938
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	45,691	54,169
Gain on sales of property and equipment	(11,572)	(11,417)
Stock-based compensation	8,994	10,241
Loss (gain) on company owned life insurance	639	(2,655)
Changes in assets and liabilities, net of the effects of consolidations:
Receivables	(112,790)	(90,764)
Costs and estimated earnings in excess of billings, net	(66,045)	(22,637)
Inventories	(6,969)	576
Real estate held for development and sale	(1,725)	(9,982)
Equity in construction joint ventures	(22,699)	(14,010)
Other assets, net	9,359	7,136
Accounts payable	86,900	75,422
Accrued expenses and other current liabilities, net	30,942	11,549
Net cash provided by operating activities	2,018	10,566
Investing Activities
Purchases of marketable securities	(115,146)	(78,355)
Maturities of marketable securities	85,875	50,900
Proceeds from sale of marketable securities	33,268	10,000
Additions to property and equipment	(34,748)	(30,182)
Proceeds from sales of property and equipment	20,071	17,225
Purchase of private preferred stock	(50)	(6,400)
Other investing activities, net	2,363	2,407
Net cash used in investing activities	(8,367)	(34,405)
Financing Activities
Long-term debt principal payments	(17,293)	(18,472)
Cash dividends paid	(15,090)	(15,110)
Purchase of common stock	(3,840)	(3,374)
Distributions to noncontrolling partners, net	(17,489)	(20,940)
Other financing activities	1,138	633
Net cash used in financing activities	(52,574)	(57,263)
Decrease in cash and cash equivalents	(58,923)	(81,102)
Cash and cash equivalents at beginning of period	252,022	338,956
Cash and cash equivalents at end of period	193,099	257,854
Cash paid during the period for:
Interest	9,718	8,196
Income taxes	905	469
Non-cash investing and financing activities:
Restricted stock/units issued, net of forfeitures	6,896	6,763
Accrued cash dividends	5,026	5,040
Debt payments out of escrow from sale of assets	$ 3,446	$ 5,487

The net change during the reporting period in the aggregate amount of expenses incurred but not yet paid. This element also represents the net change during the reporting period in other operating obligations not otherwise defined in the taxonomy.

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The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts and the increase (decrease) during the reporting period in the liability reflecting cash payments received before the related costs have been incurred.

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The amount of noncash consideration received from the sale of real estate in the form of debt reduction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The difference between the book value and the sale price of other nonspecific investments. This element is used when other, more specific, elements are not appropriate. This element refers to the gain (loss) included in earnings.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow to reacquire common stock during the period.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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