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Income Taxes Income Taxes - Reconciliation of Effective Tax Rate to Statutory Tax Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes |  |  |
Effective income tax rate (as a percent) | 28.00% | 20.00% | (67.00%)
U.S. statutory tax rate (as a percent) | 21.00% | 21.00% | 21.00%
Effective Income Tax Rate Reconciliation |  |  |
Income taxes at U.S. federal statutory rate | $ 8,182 | $ (18,056) | $ 12,276
Net state income taxes | 1,374 | (817) | 1,634
Tax credits | (720) | (1,256) | (1,757)
Unrecognized tax benefits | 598 | 772 | (1,958)
Valuation allowances and write off of tax attributes | (167) | 236 | (50,219)
Executive compensation limitation | 1,559 | 1,159 | 1,102
Stock | 162 | 538 | 66
Other | (244) | (113) | (289)
Provision for (benefit from) income taxes | $ 10,744 | $ (17,537) | $ (39,145)

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Amount 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=121826272&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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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + 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=121826272&loc=d3e32687-109319 + Details
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