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INCOME TAXES - Reconciliation of Effective Income Tax Rate from Statutory Federal Income Tax Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
U.S. federal income taxes at statutory rates | $ (28,318) | $ (2,424) | $ 30,182
Valuation allowance | 727 | 510 | 459
State income taxes, net of federal benefit and tax credits | (4,450) | (3,329) | (395)
Permanent differences | 2,606 | 1,302 | 778
GILTI, FDII, and BEAT | 0 | 399 | 0
Federal research and experimentation credits | (4,295) | (6,991) | (3,374)
Tax effects of foreign activities | 3,056 | (399) | (781)
Tax-exempt income | (91) | (137) | (94)
Provision to return adjustments | (5,460) | 253 | (1,832)
Non-deductible compensation | 1,716 | 1,025 | 1,840
Expiration of statutes and changes in estimates | 2,420 | (516) | 257
Excess tax benefits related to share-based compensation | (14,291) | (13,541) | (24,488)
Impact of change in tax law | 1,908 | 1,636 | (15,450)
Other | 59 | 52 | 585
(Benefit from) income taxes | $ (44,413) | $ (22,160) | $ (12,313)

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- Definition Amount 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 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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