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Income Taxes (Tables) | 12 Months Ended
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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)
T h e n et d e f e rr ed tax lia b ili t y i s cla ss i f ied i n t h e C o ns o li d at e d B ala n ce S h eets b a s ed o n w h en t h e f u t u r e tax b e n e f it or e x p e ns e is e x p ected to b e r e alized as f o ll o w s:
|  | 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

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