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Investments - Summary of Available-for-Sale Debt Securities and Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales and maturities (fair value)	$ 61,615	$ 32,287	$ 173,345	$ 225,989
Proceeds from sales of equity securities	0	4,158	29,137	8,285
Gross realized gains on sale of securities	65	1	364	318
Equity securities, FV-NI, Realized Gain	0	413	335	714
Gross realized losses on sale of securities	(87)	(11)	(277)	(3,125)
Equity securities, FV-NI, Realized Loss	0	0	(14,787)	0
Realized gains on sales of investment real estate	$ 0	$ 0	$ 1,213	$ 0

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- Definition

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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