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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Income Before Income Taxes | The domestic and foreign components of income before provision for income taxes are as follows for the years ended December 31:
|  | 2020 |  |  | 2019 |  |  | 2018 |
Domestic |  | $ | 68,817 |  |  | $ | 87,622 |  |  | $ | 74,479 |
Foreign |  |  | 5,856 |  |  |  | 2,551 |  |  |  | 8,348 |
Income before income taxes |  | $ | 74,673 |  |  | $ | 90,173 |  |  | $ | 82,827 |
Income Tax Expense Components | Income tax expense consisted of the following for the years ended December 31:
|  | 2020 |  |  | 2019 |  |  | 2018 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 14,645 |  |  | $ | 14,123 |  |  | $ | 9,700 |
State |  |  | 5,198 |  |  |  | 5,698 |  |  |  | 4,035 |
Foreign |  |  | 1,736 |  |  |  | 1,537 |  |  |  | 2,418 |
Total current |  |  | 21,579 |  |  |  | 21,358 |  |  |  | 16,153 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (1,721 | ) |  |  | 320 |  |  |  | 4,072 |
State |  |  | 314 |  |  |  | (25 | ) |  |  | 1,452 |
Foreign |  |  | (458 | ) |  |  | (418 | ) |  |  | (250 | )
Total deferred |  |  | (1,865 | ) |  |  | (123 | ) |  |  | 5,274 |
Income tax expense |  | $ | 19,714 |  |  | $ | 21,235 |  |  | $ | 21,427 |
Deferred Tax Assets (Liabilities) | Deferred tax assets (liabilities) consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
Deferred Tax Assets |  |  |  |  |  |  |  |
Allowance for bad debt |  | $ | 1,687 |  |  | $ | 888 |
Accrued paid time off |  |  | 2,423 |  |  |  | 1,671 |
Foreign net operating loss (NOL) carry forward |  |  | 957 |  |  |  | 866 |
State net operating loss (NOL) carry forward |  |  | 714 |  |  |  | 714 |
Stock option compensation |  |  | 2,308 |  |  |  | 2,666 |
Deferred rent |  |  | 3,091 |  |  |  | 3,129 |
Deferred compensation |  |  | 4,598 |  |  |  | 3,902 |
Foreign tax credits |  |  | 5,882 |  |  |  | 4,508 |
State tax credits |  |  | 2,108 |  |  |  | 2,026 |
Foreign exchange |  |  | 5,370 |  |  |  | 3,579 |
Foreign deferred |  |  | 650 |  |  |  | 200 |
Accrued bonus |  |  | 4,126 |  |  |  | 884 |
Accrued liabilities and other |  |  | 5,701 |  |  |  | 4,434 |
|  |  | 39,615 |  |  |  | 29,467 |
Less: Valuation Allowance |  |  | (6,839 | ) |  |  | (5,374 | )
Total Deferred Tax Assets |  |  | 32,776 |  |  |  | 24,093 |
Deferred Tax Liabilities |  |  |  |  |  |  |  |
Retention |  |  | (1,003 | ) |  |  | (1,395 | )
Prepaid expenses |  |  | (1,089 | ) |  |  | (1,451 | )
Payroll taxes |  |  | (489 | ) |  |  | (593 | )
Unbilled revenue |  |  | (1,451 | ) |  |  | (2,691 | )
Depreciation |  |  | (1,731 | ) |  |  | (3,112 | )
Amortization |  |  | (60,392 | ) |  |  | (52,076 | )
Deferred gain and other |  |  | (951 | ) |  |  | (396 | )
Total Deferred Tax Liabilities |  |  | (67,106 | ) |  |  | (61,714 | )
Total Net Deferred Tax Liability |  | $ | (34,330 | ) |  | $ | (37,621 | )
Unrecognized Tax Benefit Reconciliation | The unrecognized tax benefit reconciliation, excluding penalty and interest, is as follows:
Unrecognized tax benefits at January 1, 2018 |  | $ | 820 |
Increase attributable to tax positions taken during the current period |  |  | 216 |
Decrease attributable to settlements with taxing authorities |  |  | (37 | )
Decrease attributable to lapse of statute of limitations |  |  | (783 | )
Unrecognized tax benefits at December 31, 2018 |  |  | 216 |
Decrease attributable to tax positions taken during a prior period |  |  | (216 | )
Unrecognized tax benefits at December 31, 2019 |  |  | — |
Increase attributable to tax positions taken during the current period |  |  | 811 |
Unrecognized tax benefits at December 31, 2020 |  | $ | 811 |
Effective Income Tax Rate Reconciliation | The Company’s provision for income taxes differs from the federal statutory rate. The differences between the statutory rate and the Company’s provision are as follows:
|  | 2020 |  |  | 2019 |  |  | 2018 |
Taxes at statutory rate |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
State taxes, net of federal benefit |  |  | 5.6 | % |  |  | 5.3 | % |  |  | 5.2 | %
Foreign tax rate differential |  |  | 0.3 | % |  |  | 0.3 | % |  |  | 0.5 | %
Executive compensation |  |  | 2.4 | % |  |  | 0.6 | % |  |  | 1.0 | %
Other permanent differences |  |  | 0.1 | % |  |  | 0.7 | % |  |  | 0.8 | %
Prior year tax adjustments |  |  | (1.1 | )% |  |  | (1.0 | )% |  |  | 0.2 | %
Unrecognized tax benefits |  |  | 1.0 | % |  |  | (0.2 | )% |  |  | (0.6 | )%
Valuation allowance |  |  | 1.6 | % |  |  | 1.1 | % |  |  | 1.3 | %
Equity-based compensation |  |  | (3.8 | )% |  |  | (3.6 | )% |  |  | (3.0 | )%
Tax credits |  |  | (0.7 | )% |  |  | (0.6 | )% |  |  | (0.5 | )%
Taxes at effective rate |  |  | 26.4 | % |  |  | 23.6 | % |  |  | 25.9 | %

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