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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of income before income taxes by geographical area

Income before income taxes by geographic area was, for the years ended December 31:

(in thousands)						2023						2022						2021
Federal						$	102,014					$	104,185					$	106,956
Foreign						22,990						10,019						9,350
						$	125,004					$	114,204					$	116,306

Schedule of income tax expense

Income tax expense consisted of the following for the years ended December 31:

(in thousands)						2023						2022						2021
Current
Federal						$	21,337					$	13,948					$	16,512
Foreign						1,821						2,148						1,947
State						7,348						5,154						6,560
						30,506						21,250						25,019
Deferred
Federal						(159)						7,739						5,061
Foreign						3,984						465						287
State						(317)						1,369						933
						3,508						9,573						6,281
Income tax expense						$	34,014					$	30,823					$	31,300

Schedule of effective tax rate reconciliation

The differences between the U.S. federal statutory tax rate and the Company’s effective tax rate for operations were as follows for the years ended December 31:

						2023						2022						2021
U.S federal statutory rate						21.0		%				21.0		%				21.0		%
State income taxes, net of U.S. federal income tax expense						4.4						4.5						4.7
Tax differential on foreign earnings						0.7						0.6						0.5
Non-deductible meals and entertainment						0.5						0.2						0.1
Stock compensation excess tax benefits						(2.6)						(2.4)						(0.8)
Uncertain tax positions						—						0.1						—
Provision to return adjustments, net						0.7						0.7						0.4
Section 162(m) limitation						2.5						2.4						1.1
Other income, net						—						(0.1)						(0.1)
Effective rate						27.2		%				27.0		%				26.9		%

Schedule of net deferred tax assets and (liabilities)

The net deferred tax assets and (liabilities) arising from temporary differences was as follows at December 31:

(in thousands)						2023						2022
Deferred income tax assets:
Self-insurance reserves						$	3,850					$	2,979
Contract loss reserves						2,273						842
Stock-based awards						3,336						2,071
Bonus						11,137						8,656
Accrued vacation						2,295						2,227
Accrued profit sharing						1,707						2,030
Operating lease liabilities						8,115						6,691
Non-U.S. operating loss						2,411						2,402
Other						1,090						1,112
Total deferred income tax assets before valuation allowances						36,214						29,010
Less: valuation allowances						(2,412)						(2,402)
Total deferred income tax assets						33,802						26,608
Deferred income tax liabilities:
Property and equipment — tax over book depreciation						(45,332)						(42,413)
Non-U.S. intangible assets — tax over book amortization						(10,363)						(11,086)
Intangible assets — tax over book amortization						(4,013)						(3,331)
Right-of-use operating lease assets						(8,115)						(6,688)
Non-U.S. deferred income tax liabilities						(8,819)						(4,709)
Contract revenue adjustment						(4,790)						(4,023)
Other						(600)						(133)
Total deferred income tax liabilities						(82,032)						(72,383)
Net deferred income taxes						$	(48,230)					$	(45,775)

Schedule of liability for unrecognized tax benefits reconciliation

The following is a reconciliation of the beginning and ending liability for unrecognized tax benefits at December 31:

(in thousands)						2023						2022
Balance at beginning of period						$	390					$	328
Gross increases in current period tax positions						54						83
Reductions in tax positions due to lapse of statutory limitations						(27)						(21)
Balance at end of period						417						390
Accrued interest and penalties at end of period						107						99
Total liability for unrecognized tax benefits						$	524					$	489

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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