Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 53,057	$ 41,791	$ 38,918
Change in fair value of investment securities available for sale, net of tax of $(1,591), $826 and $(2,316), respectively	(5,956)	1,530	(4,311)
Reclassification adjustment for net gain from sale of investment securities available for sale included in income, net of tax of $(29), $(2) and $(461), respectively	(108)	(4)	(854)
Other comprehensive (loss) income	(6,064)	1,526	(5,165)
Comprehensive income	$ 46,993	$ 43,317	$ 33,753