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Income Taxes | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes We are subject to U.S. federal income tax as well as income tax in multiple state and local jurisdictions. We have concluded all U.S. federal income tax matters as well as material state and local tax matters for years through 2015. The Tax Cuts and Jobs Act (the "Tax Act") was enacted on December 22, 2017. The Tax Act significantly affects the U.S. corporate income tax by, among other things, lowering the statutory corporate tax rate from 35% to 21%. In connection with the permanent reduction in the U.S. statutory corporate tax rate, we recalculated our net deferred tax liabilities as of December 31, 2017 and recorded a provisional tax benefit of approximately $10.6 million in 2017. We applied the guidance in Staff Accounting Bulletin 118 when accounting for the enactment-date effects of the Tax Act in 2017 and throughout 2018. At December 31, 2017, we had substantially completed our provisional analysis of the income tax effects of the Tax Act and recorded a reasonable estimate in 2017 of such effects. During 2018, we refined our calculations, evaluated changes in interpretations and assumptions that we had made, applied additional guidance issued by the U.S. Government, and evaluated actions and related accounting policy decisions we have made. As of December 22, 2018, we completed our accounting for all of the enactment-date income tax effects of the Tax Act and identified an additional tax benefit of approximately $795 thousand to the provisional one-time charge for the year ended December 31, 2017, related to the Tax Act. We file consolidated federal income tax returns that include all of our subsidiaries. The components of the provision for income taxes from continuing operations for the years ended December 31, 2019, 2018 and 2017 are as follows (in thousands):
| 2019 |  | 2018 |  | 2017
Current |  |  |  |  |
Federal | $ | 7,739 |  |  | $ | 9,667 |  |  | $ | 14,149 |
State | 1,344 |  |  | 1,758 |  |  | 2,511 |
Foreign | 825 |  |  | 140 |  |  | — |
| 9,908 |  |  | 11,565 |  |  | 16,660 |
Deferred |  |  |  |  |  |  |  |
Federal | (66 | ) |  | (1,114 | ) |  | (10,645 | )
State | (490 | ) |  | (347 | ) |  | 110 |
Foreign | 51 |  |  | 64 |  |  | (136 | )
| (505 | ) |  | (1,397 | ) |  | (10,671 | )
Provision for income taxes | $ | 9,403 |  |  | $ | 10,168 |  |  | $ | 5,989 |
The differences between the amount of tax computed at the federal statutory rate of 21% in 2019 and 2018, and 35% in 2017, and the provision for income taxes from continuing operations for the years ended December 31, 2019, 2018 and 2017 are as follows (in thousands):
| 2019 |  | 2018 |  | 2017
Tax at statutory federal income tax rate | $ | 9,749 |  |  | $ | 9,502 |  |  | $ | 15,780 |
Increases (decreases) in tax resulting from: |  |  |  |  |  |  |  |
State taxes, net of federal tax benefit | 1,805 |  |  | 1,861 |  |  | 1,732 |
Permanent differences, net | (195 | ) |  | 367 |  |  | (275 | )
Impact of Tax Act | — |  |  | (795 | ) |  | (10,556 | )
Tax credits | (612 | ) |  | (375 | ) |  | (368 | )
Prior year true-up adjustment | (1,274 | ) |  | (113 | ) |  | (346 | )
Other provision adjustments | (70 | ) |  | (279 | ) |  | 22 |
Provision for income taxes | $ | 9,403 |  |  | $ | 10,168 |  |  | $ | 5,989 |
Certain amounts from the prior years have been reclassified to conform to the current year presentation. The tax effect of temporary differences representing deferred tax assets and liabilities as of December 31, 2019 and 2018 are as follows (in thousands):
| 2019 |  | 2018
Gross deferred tax assets |  |  |
Deferred compensation and accrued paid leave | $ | 7,498 |  |  | $ | 5,794 |
Accrued expenses | 303 |  |  | 1,310 |
Stock-based compensation | 678 |  |  | 819 |
Interest rate swaps | 367 |  |  | — |
Reserve for contract disallowances | 145 |  |  | 120 |
Acquisition-related expenses | — |  |  | 151 |
Capitalized inventory | — |  |  | 742 |
State operating loss carryforward | 24 |  |  | 24 |
Tax credit carryforward | 1,547 |  |  | 47 |
Foreign country operating loss carryforward | — |  |  | 157 |
| 10,562 |  |  | 9,164 |
Valuation allowance (a) | (1,165 | ) |  | (107 | )
Total gross deferred tax assets | 9,397 |  |  | 9,057 |
Gross deferred tax liabilities |  |  |
Interest rate swaps | — |  |  | (49 | )
Depreciation | (1,877 | ) |  | (1,739 | )
Deferred revenues | (1,681 | ) |  | (2,164 | )
Goodwill and intangible assets | (23,383 | ) |  | (23,395 | )
Prepaid expenses | (60 | ) |  | (120 | )
Capitalized inventory | (240 | ) |  | — |
Total gross deferred tax liabilities | (27,241 | ) |  | (27,467 | )
Net deferred tax liabilities | $ | (17,844 | ) |  | $ | (18,410 | )
(a) A valuation allowance was provided against certain state tax credit and foreign tax loss deferred tax assets arising from carryforwards of unused tax benefits.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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