Fair Value Measurements - Additional Information (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Fair Value Option Quantitative Disclosures [Line Items]
Real estate impairment loss	$ 42,000,000	$ 46,000,000
Level 3 [Member] \| Fair Value Nonrecurring [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Estimated fair value of real estate assets	$ 94,251,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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