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Balance Sheet Components - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | $ 773,242 | $ 588,640 | $ 679,617 | $ 554,341
Other comprehensive income (loss) before reclassifications | (2,825) | (817) | (2,979) | (2,163)
Amounts reclassified from other comprehensive income (loss), net of tax | 0 | (324) | (568) | (808)
Net current-period other comprehensive income (loss), net of tax | (2,825) | (1,141) | (3,547) | (2,971)
Ending balance | 807,533 | 619,238 | 807,533 | 619,238
Foreign currency translation adjustments |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (11,576) | (8,896) | (11,274) | (6,954)
Other comprehensive income (loss) before reclassifications | (2,825) | (907) | (3,127) | (2,849)
Amounts reclassified from other comprehensive income (loss), net of tax | 0 | 0 | 0 | 0
Net current-period other comprehensive income (loss), net of tax | (2,825) | (907) | (3,127) | (2,849)
Ending balance | (14,401) | (9,803) | (14,401) | (9,803)
Unrealized gain (loss) on interest rate swap hedges |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 0 | 953 | 420 | 841
Other comprehensive income (loss) before reclassifications | 0 | 90 | 148 | 686
Amounts reclassified from other comprehensive income (loss), net of tax | 0 | (324) | (568) | (808)
Net current-period other comprehensive income (loss), net of tax | 0 | (234) | (420) | (122)
Ending balance | 0 | 719 | 0 | 719
Accumulated Other Comprehensive Income (Loss) |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (11,576) | (7,943) | (10,854) | (6,113)
Ending balance | $ (14,401) | $ (9,084) | $ (14,401) | $ (9,084)

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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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