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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Taxes [Abstract] |
Summary of Income Before Taxes |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31,
﻿(in thousands) |  | 2018 |  | 2017 |  | 2016
﻿United States operations |  | $ | 106,222 |  | $ | 135,177 |  | $ | 128,072
﻿Foreign and U.S. territory operations |  |  | 26,391 |  |  | 18,798 |  |  | 21,043
﻿Total |  | $ | 132,613 |  | $ | 153,975 |  | $ | 149,115
﻿
Provision for Income Taxes |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31,
﻿(in thousands) |  | 2018 |  | 2017 |  | 2016
﻿Current expense: |  |  |  |  |  |  |  |  |
﻿Federal |  | $ | 21,055 |  | $ | 12,329 |  | $ | 43,850
﻿State |  |  | 8,676 |  |  | 6,763 |  |  | 13,039
﻿Foreign and U.S. territories |  |  | 5,550 |  |  | 3,435 |  |  | 6,573
﻿Total current expense |  |  | 35,281 |  |  | 22,527 |  |  | 63,462
﻿ |  |  |  |  |  |  |  |  |
﻿Deferred expense (benefit): |  |  |  |  |  |  |  |  |
﻿Federal |  |  | (1,773) |  |  | (30,021) |  |  | (3,054)
﻿State |  |  | 1,278 |  |  | 5,560 |  |  | (5,302)
﻿Foreign and U.S. territories |  |  | 46 |  |  | 1,365 |  |  | (1,813)
﻿Total deferred expense (benefit) |  |  | (449) |  |  | (23,096) |  |  | (10,169)
﻿Total expense (benefit) |  | $ | 34,832 |  | $ | (569) |  | $ | 53,293
﻿
Reconciliation of Provision for Income Taxes |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31,
﻿ |  | 2018 |  | 2017 |  | 2016
﻿(dollars in thousands) |  | Amount |  | Rate |  | Amount |  | Rate |  | Amount |  | Rate
﻿Federal income tax expense at statutory tax rate |  | $ | 27,849 |  | 21.0 | % |  | $ | 53,892 |  | 35.0 | % |  | $ | 52,190 |  | 35.0 | %
﻿State income taxes, net of federal tax benefit |  |  | 9,011 |  | 6.8 |  |  |  | 7,753 |  | 5.0 |  |  |  | 4,614 |  | 3.1 |
﻿Impact of federal tax law change |  |  | 211 |  | 0.2 |  |  |  | (53,348) |  | (34.6) |  |  |  | — |  | — |
﻿Officers' compensation |  |  | 3,078 |  | 2.3 |  |  |  | 2,622 |  | 1.7 |  |  |  | 3,807 |  | 2.6 |
﻿Domestic production activities deduction |  |  | — |  | — |  |  |  | (2,668) |  | (1.7) |  |  |  | (4,018) |  | (2.7) |
﻿Noncontrolling interest |  |  | (3,232) |  | (2.4) |  |  |  | (2,137) |  | (1.4) |  |  |  | — |  | — |
﻿Federal R&D credits |  |  | (2,658) |  | (2.0) |  |  |  | (470) |  | (0.4) |  |  |  | (669) |  | (0.5) |
﻿Reversal of reserve for uncertain tax positions and taxes payable due to statute expirations |  |  | (1,958) |  | (1.5) |  |  |  | (4,337) |  | (2.8) |  |  |  | — |  | — |
﻿Other |  |  | 2,531 |  | 1.9 |  |  |  | (1,876) |  | (1.2) |  |  |  | (2,631) |  | (1.8) |
﻿Income tax expense (benefit) |  | $ | 34,832 |  | 26.3 | % |  | $ | (569) |  | (0.4) | % |  | $ | 53,293 |  | 35.7 | %
﻿
Significant Components of Deferred Tax Assets and Liabilities | The following is a summary of the significant components of the deferred tax assets and liabilities: ﻿
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | As of December 31,
﻿(in thousands) |  | 2018 |  | 2017
﻿Deferred tax assets: |  |  |  |  |  |
﻿Timing of expense recognition |  | $ | 20,832 |  | $ | 22,730
﻿Net operating losses |  |  | 8,611 |  |  | 8,590
﻿Other, net |  |  | 18,828 |  |  | 15,618
﻿Deferred tax assets |  |  | 48,271 |  |  | 46,938
﻿Valuation allowance |  |  | (1,150) |  |  | (381)
﻿Net deferred tax assets |  |  | 47,121 |  |  | 46,557
﻿Deferred tax liabilities: |  |  |  |  |  |
﻿Intangible assets, due primarily to purchase accounting |  |  | (36,862) |  |  | (30,019)
﻿Fixed assets, due primarily to purchase accounting |  |  | (75,998) |  |  | (73,833)
﻿Construction contract accounting |  |  | (9,435) |  |  | (17,539)
﻿Joint ventures |  |  | (9,853) |  |  | (11,343)
﻿Other |  |  | (20,411) |  |  | (22,263)
﻿Deferred tax liabilities |  |  | (152,559) |  |  | (154,997)
﻿ |  |  |  |  |  |
﻿Net deferred tax liabilities |  | $ | (105,438) |  | $ | (108,440)
﻿ The Company had net operating loss carryforwards in various state tax jurisdictions totaling approximately $93.9 million as of December 31, 2018, with expiration dates ranging from 2020 to 2035. ﻿ T h e n et d e f e rr ed tax lia b ili t ies are presented i n t h e C o ns o li d at e d B ala n ce Sheets as follows: ﻿
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | As of December 31,
﻿(in thousands) |  | 2018 |  | 2017
﻿Deferred tax assets |  | $ | 83 |  | $ | 64
﻿Deferred tax liabilities |  |  | (105,521) |  |  | (108,504)
﻿Net deferred tax liabilities |  | $ | (105,438) |  | $ | (108,440)
﻿
Reconciliation of Gross Unrecognized Tax Benefit |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | As of December 31,
﻿(in thousands) |  | 2018 |  | 2017 |  | 2016
﻿Beginning balance |  | $ | 6,495 |  | $ | 7,574 |  | $ | 3,612
﻿Change in tax positions of prior years |  |  | (302) |  |  | (1,207) |  |  | 3,543
﻿Change in tax positions of current year |  |  | 763 |  |  | 128 |  |  | 419
﻿Reduction in tax positions for statute expirations |  |  | (1,958) |  |  | — |  |  | —
﻿Ending Balance |  | $ | 4,998 |  | $ | 6,495 |  | $ | 7,574
﻿

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