Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Assets Held for Sale - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Long Lived Assets Held For Sale [Line Items]
Net proceeds from sale of building			$ 7,400,000
Impairment charges	$ 0	$ 0		$ 0	$ 916,000
Level 2 [Member]
Long Lived Assets Held For Sale [Line Items]
Impairment charges	0	$ 0		0	$ 900,000
Other Assets [Member]
Long Lived Assets Held For Sale [Line Items]
Building classified as held for sale	$ 1,900,000			$ 1,900,000		$ 1,900,000