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Balance Sheet Components - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |
Balance at beginning of period | $ 431,607 |
Other comprehensive income (loss) before reclassifications | 1,099 | $ (327)
Amounts reclassified from other comprehensive income (loss), net of tax | 6 | 0
Net current-period other comprehensive income (loss), net of tax | 1,105 | (327)
Balance at end of period | 438,943 |
Foreign currency translation adjustments |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |
Balance at beginning of period | (10,764) | (2,730)
Other comprehensive income (loss) before reclassifications | 923 | (327)
Amounts reclassified from other comprehensive income (loss), net of tax | 0 | 0
Net current-period other comprehensive income (loss), net of tax | 923 | (327)
Balance at end of period | (9,841) | (3,057)
Unrealized gain (loss) on interest rate swap hedges |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |
Balance at beginning of period | 1,245 | 0
Other comprehensive income (loss) before reclassifications | 176 | 0
Amounts reclassified from other comprehensive income (loss), net of tax | 6 | 0
Net current-period other comprehensive income (loss), net of tax | 182 | 0
Balance at end of period | 1,427 | 0
AOCI Attributable to Parent |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |
Balance at beginning of period | (9,519) | (2,730)
Balance at end of period | $ (8,414) | $ (3,057)

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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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