Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Accumulated other comprehensive income (loss) (Details)

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Summary of Significant Accounting Policies - Accumulated other comprehensive income (loss) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
Other income (expense), net  
Reclassification adjustment for losses on available-for-sale debt securities $ 2,473