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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Allowance for credit losses |  |  |
Movement in Valuation Allowances and Reserves |  |  |
Balance at Beginning of Period | $ 578 | $ 724 | $ 778
Charges to Earnings | (22) | 79 | 83
Charges to Other Accounts | (234) | (8) | (15)
Deductions | (36) | (217) | (122)
Balance at End of Period | 286 | 578 | 724
Deferred tax valuation allowance |  |  |
Movement in Valuation Allowances and Reserves |  |  |
Balance at Beginning of Period | 52,913 | 45,483 | 22,830
Charges to Earnings | 35,261 | 7,472 | 22,675
Charges to Other Accounts | (17,084) | (42) | (22)
Deductions | 0 | 0 | 0
Balance at End of Period | 71,090 | 52,913 | 45,483
Other reserves |  |  |
Movement in Valuation Allowances and Reserves |  |  |
Balance at Beginning of Period | 2,901 | 3,008 | 2,544
Balance at End of Period | $ 3,380 | $ 2,901 | $ 3,008

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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