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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 12,574	$ 23,759	$ 45,472
Unrealized gain (loss) on securities available-for-sale:
Unrealized gain (loss) arising during the period	21,064	8,285	(28,230)
Reclassification adjustment for (gain) loss included in net income	(1,418)	3,426	(3,906)
Reclassification adjustment for OTTI loss included in net income	0	506	2,296
Total other comprehensive income (loss)	19,646	12,217	(29,840)
Comprehensive income	$ 32,220	$ 35,976	$ 15,632

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