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Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 5,930 | $ 5,050 | $ 1,409
Charged (Credited) to Cost and Expenses | (117) | 946 | 812
Debited (Credited) to Other Accounts | 24 | 3 | 77
Amount Written Off | (3,010) | (402) | (369)
Acquisition and translation adjustments | (31) | 333 | 3,121
Balance at End of Period | 2,796 | 5,930 | 5,050
Accounts Receivable |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 5,738 | 4,796 | 1,240
Charged (Credited) to Cost and Expenses | (127) | 1,008 | 727
Debited (Credited) to Other Accounts | 12 | 3 | 77
Amount Written Off | (3,010) | (402) | (369)
Acquisition and translation adjustments | (31) | 333 | 3,121
Balance at End of Period | 2,582 | 5,738 | 4,796
Investment in sales-type leases |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 192 | 254 | 169
Charged (Credited) to Cost and Expenses | 10 | (62) | 85
Debited (Credited) to Other Accounts | 12 | 0 | 0
Amount Written Off | 0 | 0 | 0
Acquisition and translation adjustments | 0 | 0 | 0
Balance at End of Period | $ 214 | $ 192 | $ 254

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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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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