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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2013
Income Tax Disclosure [Abstract] |
Schedule of Components of Provision for Income Taxes | The components of the provision for (benefit from) income taxes are as follows:
|  | Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 5,737 |  |  | $ | 5,428 |  |  | $ | 2,639 |
State |  |  | 566 |  |  |  | 130 |  |  |  | 695 |
Total current tax expense |  |  | 6,303 |  |  |  | 5,558 |  |  |  | 3,334 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (7,319 | ) |  |  | (296 | ) |  |  | 5,380 |
State |  |  | (1,110 | ) |  |  | 259 |  |  |  | 904 |
Total deferred tax expense |  |  | (8,429 | ) |  |  | (37 | ) |  |  | 6,284 |
|  | $ | (2,126 | ) |  | $ | 5,521 |  |  | $ | 9,618 |
Schedule of Effective Income Tax Rate Reconciliation | The difference between the Company’s effective income tax rates and the statutory United States federal income tax rate of 35% is explained as follows:
|  | Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Provision (benefit) at statutory rate of 35% |  | $ | (1,067 | ) |  | $ | 7,618 |  |  | $ | 7,800 |
State provision, net of federal benefit |  |  | (393 | ) |  |  | 519 |  |  |  | 922 |
Research and development credits |  |  | (916 | ) |  |  | (1,734 | ) |  |  | — |
Domestic manufacturing deduction |  |  | (641 | ) |  |  | (762 | ) |  |  | (389 | )
Sale of business |  |  | — |  |  |  | — |  |  |  | 341 |
Change in valuation allowance |  |  | 954 |  |  |  | — |  |  |  | 872 |
Uncertain tax positions |  |  | (311 | ) |  |  | (67 | ) |  |  | 126 |
Nondeductible expenses |  |  | 370 |  |  |  | 278 |  |  |  | 190 |
Other |  |  | (122 | ) |  |  | (331 | ) |  |  | (244 | )
|  | $ | (2,126 | ) |  | $ | 5,521 |  |  | $ | 9,618 |
Effective tax (benefit) rate |  |  | (69.7 | )% |  |  | 25.4 | % |  |  | 43.2 | %
Schedule of Current and Noncurrent Deferred Tax Assets and Liabilities | The tax effect of temporary differences that give rise to significant portions of deferred tax assets and liabilities is presented below:
|  | December 31, |
|  | 2013 |  |  | 2012 |
|  | (in thousands) |
Current deferred tax assets: |  |  |  |  |  |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts, net |  | $ | 2,384 |  |  | $ | 1,323 |
Accrued employee benefits |  |  | 951 |  |  |  | 1,612 |
Inventories |  |  | 2,671 |  |  |  | 1,393 |
Trade receivable, net |  |  | 319 |  |  |  | 650 |
Net operating loss carryforwards |  |  | 500 |  |  |  | 364 |
Other |  |  | 520 |  |  |  | 693 |
|  |  | 7,345 |  |  |  | 6,035 |
Valuation allowance |  |  | (500 | ) |  |  | (146 | )
|  |  | 6,845 |  |  |  | 5,889 |
Current deferred tax liabilities: |  |  |  |  |  |  |  |
Prepaid expenses |  |  | (637 | ) |  |  | (712 | )
Current deferred tax assets, net |  |  | 6,208 |  |  |  | 5,177 |
Noncurrent deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  | 211 |  |  |  | 549 |
Tax credit carryforwards |  |  | 478 |  |  |  | 64 |
Accrued employee benefits |  |  | 3,740 |  |  |  | 3,673 |
Other assets |  |  | 5,520 |  |  |  | 4,527 |
Other |  |  | 138 |  |  |  | 17 |
|  |  | 10,087 |  |  |  | 8,830 |
Valuation allowance |  |  | (1,394 | ) |  |  | (794 | )
|  |  | 8,693 |  |  |  | 8,036 |
Noncurrent deferred tax liabilities: |  |  |  |  |  |  |  |
Property and equipment |  |  | (19,343 | ) |  |  | (23,290 | )
Intangible assets |  |  | (1,192 | ) |  |  | — |
Noncurrent deferred tax liabilities, net |  |  | (11,842 | ) |  |  | (15,254 | )
Net deferred tax liabilities |  | $ | (5,634 | ) |  | $ | (10,077 | )
Schedule of Unrecognized Tax Benefits | A summary of the changes in the unrecognized tax benefits during the years ended December 31, 2013, 2012 and 2011 is presented below (in thousands):
|  | 2013 |  |  | 2012 |  |  | 2011 |
Unrecognized tax benefits, beginning of year |  | $ | 5,245 |  |  | $ | 309 |  |  | $ | 125 |
Increases for positions taken in prior years |  |  | 646 |  |  |  | 3,571 |  |  |  | 10 |
Decreases for positions taken in prior years |  |  | (696 | ) |  |  | (184 | ) |  |  | — |
Increases for positions taken in the current year |  |  | 1,012 |  |  |  | 1,549 |  |  |  | 174 |
Unrecognized tax benefits, end of year |  | $ | 6,207 |  |  | $ | 5,245 |  |  | $ | 309 |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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