Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of Income (Loss) Before Taxes
U.S. Operations									$ 127,682,000	$ (271,683,000)	$ 133,501,000
Foreign Operations									11,933,000	3,841,000	3,546,000
Income (Loss) before income taxes	53,507,000	37,035,000	25,157,000	23,916,000	48,098,000	44,182,000	(363,695,000)	3,573,000	139,615,000	(267,842,000)	137,047,000
Current Expense:
Federal									29,034,000	19,573,000	30,848,000
State									9,018,000	3,508,000	6,303,000
Foreign									4,256,000	1,542,000	1,325,000
Total current									42,308,000	24,623,000	38,476,000
Deferred (Benefit) Expense:
Federal									9,547,000	(28,157,000)	16,351,000
State									577,000	1,104,000	(3,718,000)
Foreign									(113,000)	(12,000)	(210,000)
Total deferred									10,011,000	(27,065,000)	12,423,000
Total (benefit) provision									52,319,000	(2,442,000)	50,899,000
Reconciliation of Provision (Benefit) for Income Taxes
Federal income expense (benefit) at statutory tax rate									48,865,000	(93,745,000)	47,963,000
State income taxes, net of federal tax benefit									6,236,000	3,214,000	2,529,000
Officers' compensation									1,732,000	1,473,000	224,000
Domestic Production Activities Deduction									(3,641,000)	(2,246,000)	(2,321,000)
Goodwill Impairment										89,191,000
Other									(873,000)	(329,000)	2,504,000
Total (benefit) provision									52,319,000	(2,442,000)	50,899,000
Reconciliation of Effective Income Tax Rate
Federal income expense (benefit) at statutory tax rate (in hundredths)									35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit (in hundredths)									4.50%	(1.20%)	1.80%
Officers' compensation (in hundredths)									1.20%	(0.60%)	0.20%
Domestic Production Activities Deduction (in hundredths)									(2.60%)	(2.40%)	(4.80%)
Goodwill impairment (in hundredths)										(33.30%)
Other (in hundredths)									(0.60%)	3.40%	4.90%
(Benefit) provision for income taxes (in hundredths)									37.50%	0.90%	37.10%
Goodwill and intangible asset impairment							376,600,000			376,574,000
Impairment of goodwill and intangible assets that yielded permanent tax differences										255,000,000
Reduction in provision for income taxes as a result of goodwill impairment										50,200,000
Decrease in unrecognized tax benefits within the next twelve months due to the settlement of audits or the expiration of statute of limitations in various jurisdictions		1,100,000
Deferred Tax Assets
Timing of expense recognition	24,170,000				28,448,000				24,170,000	28,448,000
Net operating losses	4,123,000				5,517,000				4,123,000	5,517,000
Other, net	5,641,000				8,763,000				5,641,000	8,763,000
Deferred tax assets	33,934,000				42,728,000				33,934,000	42,728,000
Valuation Allowance	(2,817,000)				(2,817,000)				(2,817,000)	(2,817,000)
Net deferred tax assets	31,117,000				39,911,000				31,117,000	39,911,000
Deferred Tax Liabilities
Intangible assets, due primarily to purchase accounting	(18,260,000)				(26,768,000)				(18,260,000)	(26,768,000)
Fixed assets, due primarily to purchase accounting	(79,243,000)				(76,095,000)				(79,243,000)	(76,095,000)
Construction contract accounting	(6,432,000)				(5,613,000)				(6,432,000)	(5,613,000)
Joint ventures - construction	(5,229,000)				(7,038,000)				(5,229,000)	(7,038,000)
Contested legal settlement	(12,012,000)								(12,012,000)
Other	(3,408,000)				(390,000)				(3,408,000)	(390,000)
Deferred tax liabilities	(124,584,000)				(115,904,000)				(124,584,000)	(115,904,000)
Net deferred tax liability	(93,467,000)				(75,993,000)				(93,467,000)	(75,993,000)
Net Deferred Tax Liability
Current deferred tax asset	8,240,000				10,071,000				8,240,000	10,071,000
Long-term deferred tax asset	22,877,000				29,840,000				22,877,000	29,840,000
Current deferred tax liability	(10,251,000)				(6,004,000)				(10,251,000)	(6,004,000)
Long-term deferred tax liability	(114,333,000)				(109,900,000)				(114,333,000)	(109,900,000)
Net deferred tax liability	(93,467,000)				(75,993,000)				(93,467,000)	(75,993,000)
Increase in valuation allowance									2,800,000	2,800,000
Unremitted earnings of foreign subsidiaries	4,300,000				14,300,000				4,300,000	14,300,000
Reconciliation of gross unrecognized tax benefits
Net increase in unrecognized tax benefit									1,400,000	2,000,000
Related interest net of federal tax liability included in tax liabilities	500,000				300,000				500,000	300,000
Gross unrecognized tax expense at beginning of the year:				4,023,000				2,043,000	4,023,000	2,043,000	1,150,000
Additions based on tax positions related to current year									1,254,000	1,281,000	875,000
Additions/reductions for tax positions of prior years									182,000	1,857,000	47,000
Reductions for tax positions of prior years (expiration of statute of limitations)										(1,158,000)	(29,000)
Gross unrecognized tax expense at end of the year:	5,459,000				4,023,000				5,459,000	4,023,000	2,043,000
Interest expense related to unrecognized tax benefit									$ 200,000