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Investment Securities - Schedule of available-for-sale securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Investments in equity securities	$ 7,543	$ 5,857
Investments in equity securities accounted for under the equity method	16,335	12,252
Total investment securities	23,878	18,109
Net gains (losses) recognized on investment securities	5,101	688
Less: Net realized gains (losses) recognized on investment securities sold during the period	250	157
Unrealized gains (losses recognized on investment securities held as of the end of the period	$ 4,851	$ 531

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all investments.

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Amount of realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI).

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