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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 13,316	$ 8,390
Other Comprehensive Income [Abstract]
Unrealized gains (losses) on available-for-sale securities, net of taxes of $(3,123) and $2,540 for three months ended March 31, 2019 and 2018, respectively.	7,645	(6,221)
Amortized holding losses on held-to-maturity securities transferred from available-for-sale, net of taxes of $(8) for three months ended March 31, 2019 and 2018.	21	20
Less: reclassification adjustment for realized gains included in net income, net of taxes of $16 and $6 for three months ended March 31, 2019 and 2018, respectively.	(38)	(14)
Other comprehensive income (loss), net of taxes	7,628	(6,215)
Comprehensive income	$ 20,944	$ 2,175

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