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Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 951	$ 914
Operating cash flows from finance leases	1,896	2,196
Financing cash flows from finance leases	12,620	11,925	$ 0
Right-of-use assets obtained in exchange for new lease liabilities:
Finance leases	662	49,909
Operating leases	$ 1,072	$ 2,736

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Cash paid for amounts included in the measurement of lease liabilities.

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Repayments of finance lease liabilities.

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Right-of-use assets obtained in exchange for new lease liabilities.

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Amount of interest paid on finance lease liability.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
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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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-Publisher FASB
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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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

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