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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 23,759	$ 45,472	$ 57,709
Unrealized gain (loss) on securities available-for-sale:
Unrealized gain (loss) arising during the period	8,285	(28,230)	10,068
Unrealized gain arising from the reclassification of securities held-to-maturity to securities available-for-sale	0	0	12,845
Reclassification adjustment for loss (gain) included in net income	3,426	(3,906)	(8,644)
Reclassification adjustment for OTTI loss included in net income	506	2,296	0
Total other comprehensive income (loss)	12,217	(29,840)	14,269
Comprehensive income	$ 35,976	$ 15,632	$ 71,978

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