Consolidated Statements of Other Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (7,356)	$ 9,439	$ (3,499)	$ 18,789
Other Comprehensive Income
Unrealized gain on available-for-sale debt securities	3,618	9,977	12,150	22,327
Less: income tax	884	2,449	2,968	5,480
Unrealized gain on available-for-sale debt securities, net of income tax	2,734	7,528	9,182	16,847
Reclassification adjustment for realized gains included in income	320	406	713	433
Less: income tax	78	100	174	107
Less: reclassification adjustment for realized gains included in income, net of income tax	242	306	539	326
Other comprehensive income	2,492	7,222	8,643	16,521
Comprehensive Income (Loss)	$ (4,864)	$ 16,661	$ 5,144	$ 35,310