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	$ 63,401	$ 52,580	$ 41,518
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Unrealized losses on securities available for sale	(3,507)	(903)	(1,038)
Reclassification for securities gains included in net income	0	(1,640)	(233)
Unrealized gains on derivatives	41	37	672
Change in pension liability, net	20	(16)	42
Other comprehensive loss	(3,446)	(2,522)	(557)
TOTAL COMPREHENSIVE INCOME	$ 59,955	$ 50,058	$ 40,961