Accumulated Other Comprehensive (Loss) Income - Summary of changes in accumulated other comprehensive (loss) income by component, net of tax (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Unrealized Gains on Available for Sale Securities
Beginning balance	$ (80)	$ (3,257)	$ (2,614)	$ (1,390)
Other comprehensive (loss) income before reclassifications	466	(564)	3,000	(2,431)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current period other comprehensive (loss) income	466	(564)	3,000	(2,431)
Ending balance	386	(3,821)	386	(3,821)
Reclassifications	$ 0	$ 0	$ 0	$ 0

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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