Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Taxes [Abstract]

Income Before Taxes

	Year Ended December 31,
(in thousands)	2015		2014		2013
United States Operations	$	69,822	$	170,517	$	127,682
Foreign Operations	$	4,017	$	16,921	$	11,933
Total	$	73,839	$	187,438	$	139,615

Provision for Income Taxes

	Year Ended December 31,
(in thousands)	2015		2014		2013
Current expense:
Federal	$	5,465	$	45,074	$	29,034
State		(362)		11,174		9,018
Foreign		1,126		3,203		4,256
Total current		6,229		59,451		42,308
Deferred (benefit) expense:
Federal		19,583		9,992		9,547
State		2,735		10,059		577
Foreign		—		—		(113)
Total deferred		22,318		20,051		10,011
Total provision	$	28,547	$	79,502	$	52,319

Reconciliation of Provision for Income Taxes

	2015				2014				2013
(dollars in thousands)	Amount		Rate		Amount		Rate		Amount		Rate
Federal income expense at statutory tax rate	$	25,844	35.0	%	$	65,603	35.0	%	$	48,865	35.0	%
State income taxes, net of federal tax benefit		1,250	1.7			10,367	5.5			6,236	4.5
Officers' compensation		2,900	3.9			3,657	2.0			1,732	1.2
Domestic Production Activities Deduction		(1,499)	(2.0)			(5,170)	(2.8)			(3,641)	(2.6)
Impact of state tax rate changes on deferreds		2,435	3.3			3,245	1.7			—	—
Other		(2,383)	(3.2)			1,800	1.0			(873)	(0.6)
Provision for income taxes	$	28,547	38.7	%	$	79,502	42.4	%	$	52,319	37.5	%

Significant Components of Deferred Tax Assets and Liabilities

The following is a summary of the significant components of the deferred tax assets and liabilities:

	December 31,
(in thousands)	2015		2014
Deferred Tax Assets
Timing of expense recognition	$	58,048	$	47,017
Net operating losses		3,564		2,188
Other, net		114,225		6,980
Deferred tax assets		175,837		56,185
Valuation allowance		(460)		(1,369)
Net deferred tax assets		175,377		54,816
Deferred Tax Liabilities
Intangible assets, due primarily to purchase accounting		(99,549)		(26,094)
Fixed assets, due primarily to purchase accounting		(101,022)		(90,886)
Construction contract accounting		(7,530)		(6,854)
Joint ventures - construction		(27,604)		(30,654)
Other		(62,494)		(10,012)
Deferred tax liabilities		(298,199)		(164,500)
Net deferred tax liability	$	(122,822)	$	(109,684)

ThenetdeferredtaxliabilityisclassifiedintheConsolidatedBalanceSheetsbasedon  whenthe  futuretax benefit or expenseisexpectedto berealizedas  follows:

	December 31,
(in thousands)	2015		2014
Current deferred tax asset	$	26,306	$	17,962
Long-term deferred tax asset		149,071		36,854
Current deferred tax liability		(24,889)		(14,129)
Long-term deferred tax liability		(273,310)		(150,371)
Net deferred tax liability	$	(122,822)	$	(109,684)

Reconciliation of Gross Unrecognized Tax Benefit

	As of December 31,
(in thousands)	2015		2014		2013
Beginning balance	$	7,636	$	5,459	$	4,023
Change in tax positions of prior years		(3,073)		426		182
Change in tax positions of current year		169		2,929		1,254
Reduction in tax positions for statute expirations		(1,120)		(1,178)		—
Ending Balance	$	3,612	$	7,636	$	5,459