Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Federal:
Current	$ (1,298,000)	$ 10,410,000	$ 11,136,000
Deferred	(18,606,000)	9,518,000	7,914,000
Total federal	(19,904,000)	19,928,000	19,050,000
State:
Current	1,592,000	4,689,000	2,952,000
Deferred	(951,000)	(3,508,000)	1,346,000
Total state	641,000	1,181,000	4,298,000
Total provision for (benefit from) income taxes	(19,263,000)	21,109,000	23,348,000
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal statutory tax	(22,411,000)	28,360,000	31,301,000
State taxes, net of federal tax benefit	101,000	5,299,000	3,497,000
Percentage depletion deduction	(787,000)	(1,422,000)	(1,254,000)
Domestic production deduction	(27,000)	(1,367,000)	(1,604,000)
Noncontrolling interests	2,920,000	(5,124,000)	(5,223,000)
Settlements and effective settlements of audit issues	0	0	(2,348,000)
Other	(1,443,000)	(752,000)	(2,021,000)
Total provision for (benefit from) income taxes	(19,263,000)	21,109,000	23,348,000
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory tax, Percent	35.00%	35.00%	35.00%
State taxes, net of federal tax benefit, Percent	(0.20%)	6.50%	3.90%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance	0.00%	(7.20%)	0.00%
Percentage depletion deduction, Percent	1.20%	(1.80%)	(1.40%)
Domestic production deduction, Percent	0.10%	(1.70%)	(1.80%)
Noncontrolling interests, Percent	(4.60%)	(6.30%)	(5.80%)
Settlements and effective settlements of audit issues, Percent	0.00%	0.00%	(2.60%)
Other, Percent	2.30%	(0.80%)	(2.30%)
Total, Percent	30.10%	26.10%	26.10%
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	0	(5,803,000)	0
Income Tax Reconciliation, Nondeductible Expense	2,384,000	1,918,000	1,000,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense	(3.70%)	2.40%	1.10%
Deferred tax assets:
Receivables	2,870,000	2,876,000
Inventory	4,637,000	5,611,000
Insurance	10,813,000	10,476,000
Deferred compensation	13,372,000	14,055,000
Other accrued liabilities	6,739,000	7,184,000
Contract income recognition	11,503,000	4,171,000
Impairments on real estate investments	14,313,000	5,002,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	7,206,000	6,064,000
Other	420,000	416,000
Net operating loss carryforward	4,439,000	8,359,000
Valuation allowance	(3,731,000)	(5,242,000)	(10,668,000)
Total deferred tax assets	72,581,000	58,972,000
Deferred tax liabilities:
Property and equipment	24,500,000	30,448,000
Total deferred tax liabilities	24,500,000	30,448,000
Net deferred tax assets	48,081,000	28,524,000
Deferred Tax Assets, Net, Classification [Abstract]
Current deferred tax assets, net	55,874,000	36,687,000
Long-term deferred tax liabilities, net	7,793,000	8,163,000
Net deferred tax assets	48,081,000	28,524,000
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Beginning balance	5,242,000	10,668,000	13,111,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	(1,511,000)	(5,426,000)	(2,443,000)
Ending balance	3,731,000	5,242,000	10,668,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	2,300,000
Ending balance	2,200,000	2,300,000
Unrecognized Tax Benefits	2,200,000	2,300,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,300,000	800,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	100,000	(100,000)	100,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	1,000,000	900,000
Unrecognized Tax Benefits, Possible Reduction Resulting from Lapse of Applicable Statute of Limitations	600,000
Other Long Term Liabilities [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	2,315,000	2,339,000	5,650,000
Gross increases – current period tax positions	363,000	1,017,000	1,726,000
Gross decreases – current period tax positions	(638,000)	(800,000)	(1,420,000)
Gross increases – prior period tax positions	508,000	4,000	1,485,000
Gross decreases – prior period tax positions	(2,000)	(245,000)	(1,467,000)
Settlements with taxing authorities/lapse of statute of limitations	(315,000)	0	(3,635,000)
Ending balance	2,231,000	2,315,000	2,339,000
Unrecognized Tax Benefits	$ 2,231,000	$ 2,315,000	$ 2,339,000