CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 36,497	$ 26,477	$ 19,972
Unrealized losses on available for sale securities:
Unrealized losses arising during the period	(1,169)	(2,310)	(959)
Less: Reclassification adjustment for net gains included in net income		(119)	(527)
Before tax	(1,169)	(2,429)	(1,486)
Tax effect	438	930	573
Net of tax	(731)	(1,499)	(913)
Unrealized gain/(loss) on cash flow hedge
Unrealized holding gain/(loss)	2,138	587	(1,162)
Reclassification adjustment for losses included in net income
Before tax	2,138	587	(1,162)
Tax effect	(873)	(240)	475
Net of tax	1,265	347	(687)
Total other comprehensive income/(loss)	534	(1,152)	(1,600)
Total comprehensive income	$ 37,031	$ 25,325	$ 18,372