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v3.21.2

Income tax provision (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Reconciliation of effective tax rate |  |
Income tax at federal statutory rate | 21.00% | 21.00%
Goodwill impairment charges (Note 8) | 0.00% | 46.80%
Non-deductible acquisition costs | 3.70% | 0.00%
State income tax, net of federal income tax benefit | 3.60% | 2.10%
Non-deductible executive compensation | 1.50% | 2.20%
Tax impact of share-based compensation | 1.20% | 8.50%
Foreign tax rate differences | 0.90% | 4.30%
Change in unrecognized tax benefits, including interest and penalties | 0.40% | (3.30%)
Research and development tax credit | (0.90%) | (3.70%)
Payables and receivables for prior year tax returns | (0.60%) | 3.20%
Non-taxable income from employee life insurance policies | (0.30%) | (1.10%)
Return to provision adjustments | 0.00% | (2.60%)
Change in valuation allowances | 0.00% | 0.90%
Other | 0.00% | 1.80%
Effective tax rate | 30.50% | 80.10%

X
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- Definition Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120384911&loc=d3e23163-113944 + Details
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