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Leases - Supplemental unaudited consolidated balance sheet information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Supplemental unaudited consolidated balance sheet information
Operating lease right-of-use assets	$ 10,903
Operating lease liabilities current	2,924
Operating lease liabilities noncurrent	11,304
Operating lease liabilities	$ 14,228
Weighted average remaining lease term	6 years 9 months 18 days
Weighted-average discount rate	5.00%
Supplemental unaudited interim consolidated cash flow information
Operating cash flows from operating leases	$ 2,736
ROU assets obtained in exchange for new operating lease liabilities	$ 4,262

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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