CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities
Net income	$ 46,034	$ 33,109
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation, depletion and amortization	46,637	48,517
Gain on sales of property and equipment	(2,364)	(2,090)
Change in deferred income taxes	(87)	14,967
Stock-based compensation	11,013	6,962
Equity in net income from unconsolidated joint ventures	(15,903)	(29,465)
Gain on real estate entity	(2,452)	0
Net Income from affiliates	(4,583)	(1,762)
Changes in assets and liabilities:
Receivables	(169,678)	(148,791)
Costs and estimated earnings in excess of billings, net	1,793	3,621
Inventories	(5,462)	8,631
Contributions to unconsolidated construction joint ventures	(11,545)	(55,394)
Distributions from unconsolidated construction joint ventures	5,850	41,558
Other assets, net	(2,122)	7,481
Accounts payable	62,787	48,034
Accrued expenses and other current liabilities, net	19,782	16,493
Net cash used in operating activities	(20,300)	(8,129)
Investing Activities
Purchases of marketable securities	(84,758)	(54,961)
Maturities of marketable securities	30,000	26,700
Proceeds from called marketable securities	50,000	45,000
Purchases of property and equipment ($10.0 million and $0 related to CCJVs)	(67,889)	(26,144)
Proceeds from sales of property and equipment	5,790	3,439
Distributions from affiliates	2,233	305
Collection of notes receivable	3,880	542
Other investing activities, net	(33)	(249)
Net cash used in investing activities	(60,777)	(5,368)
Financing Activities
Long-term debt principal repayments	(3,750)	(306)
Cash dividends paid	(15,415)	(15,326)
Repurchases of common stock	(4,946)	(3,325)
Contributions from (distributions to) non-controlling partners, net	1,522	(1,740)
Other financing activities	1,055	18
Net cash used in financing activities	(21,534)	(20,679)
Decrease in cash and cash equivalents	(102,611)	(34,176)
Cash and cash equivalents at beginning of period	252,836	255,961
Cash and cash equivalents at end of period	150,225	221,785
Cash paid during the period for:
Interest	7,557	7,787
Income taxes	6,748	450
Other non-cash operating activities:
Performance guarantees	17,596	(10,700)
Non-cash investing and financing activities:
Restricted stock units issued, net of forfeitures	21,057	5,924
Accrued cash dividends	5,148	5,119
Accrued equipment purchases	$ (3,453)	$ 3,245