Investment Securities - Realized Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Sales transactions:
Gross gains	$ 665	$ 0	$ 1,769
Gross losses	(9)	0	(3,881)
Gains (losses) on sales transactions, net	656	0	(2,112)
Maturities and other securities transactions:
Gross gains	34	67	42
Gross losses	(166)	(217)	(272)
Gains (losses) on maturities and other securities transactions, net	(132)	(150)	(230)
Net gains (losses) on securities transactions	524	(150)	(2,342)
Sales of investment securities available for sale	$ 30,020	$ 271,901	$ 44,377

Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

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The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

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The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale.

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Amount of cash inflow from sale 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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Gains (losses) on maturities and other securities transactions

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Gross gains realized from maturities and other securities transactions not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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Gross losses realized from maturities and other securities transactions not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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Maturities And Other Securities Transactions

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Sales Transactions

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