CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 15,597	$ 11,407	$ 41,380	$ 31,517
Securities available-for-sale:
Change in net unrealized gains (losses) on securities available-for-sale	(3,412)	(1,857)	(16,205)	(1,871)
Reclassification of net gains (losses) included in net income	0	0	66	0
Reclassification of unrealized losses on securities transferred to held-to-maturity	0	0	2,188	0
Tax effect	(717)	(650)	(2,930)	(655)
Other comprehensive loss, net of tax, for securities available-for-sale	(2,695)	(1,207)	(11,021)	(1,216)
Securities held-to-maturity:
Reclassification of unrealized losses on securities transferred from available-for-sale	0	0	(2,188)	0
Amortization of unrealized losses on securities transferred from available-for-sale	80	0	178	0
Other comprehensive loss, net of tax, for securities held-to-maturity	80	0	(2,010)	0
OTHER COMPREHENSIVE LOSS, NET OF TAX	(2,615)	(1,207)	(13,031)	(1,216)
COMPREHENSIVE INCOME	$ 12,982	$ 10,200	$ 28,349	$ 30,301