Securities - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Total unrealized gains/(losses) on debt securities available-for-sale
Gross Unrealized Gains	$ 33,478	$ 11,659
Gross Unrealized Losses	(90)	(953)
Net Unrealized Gains (Losses)	33,388	10,706
Income tax (expense) benefit, Gross Unrealized Gains	(7,128)	(2,486)
Income tax (expense) benefit, Gross Unrealized Losses	19	203
Income tax (expense) benefit, Net Unrealized (Losses)/Gains	(7,109)	(2,283)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Gains	26,350	9,173
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Losses	(71)	(750)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Net Unrealized Gains/(Losses)	$ 26,279	$ 8,423