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Leases - Supplemental information related to leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 2,721	$ 2,496
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	2,816	2,697
Leased assets obtained in exchange for new operating lease liabilities	$ 3,535	$ 1,440
Weighted average remaining lease term (in years)	3 years 9 months 3 days	4 years 11 months 19 days
Weighted average discount rate	4.99%	5.49%

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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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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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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