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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Change in unrealized investment gains/losses, tax expense (benefit)	$ (3,409)	$ 3,992
Common stock: class A shares issued related to warrants (in shares)	6,474	39,195
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01

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Face amount or stated value per share of common stock.

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Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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