Other Assets - Summary of Financial Information For Investees (Detail) - MEDIAN [Member] $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($)
Other Assets [Line Items]
Revenue	$ 42,526
Net income	6,009
Assets	2,018,496
Liabilities	$ 1,553,191

Other Assets [Line Items]

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- Definition

The amount of assets reported by an equity method investment of the entity.

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The amount of liabilities reported by an equity method investment of the entity.

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The amount of net income (loss) reported by an equity method investment of the entity.

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