Securities - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on debt securities available-for-sale, Gross Unrealized Gains	$ 11,659	$ 3,514
Total unrealized gains/(losses) on debt securities available-for-sale, Gross Unrealized Losses	(953)	(8,628)
Total unrealized gains/(losses) on debt securities available-for-sale, Net Unrealized (Losses)/Gains	10,706	(5,114)
Income tax (expense) benefit, Gross Unrealized Gains	(2,486)	(746)
Income tax (expense) benefit, Gross Unrealized Losses	203	1,832
Income tax (expense) benefit, Net Unrealized (Losses)/Gains	(2,283)	1,086
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Gains	9,173	2,768
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Losses	(750)	(6,796)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Net Unrealized Gains/(Losses)	$ 8,423	$ (4,028)