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:	$ 17,028	$ 13,100	$ 6,267
Available-for-sale securities:
Changes in unrealized losses	(99)	(95)	(151)
Reclassification adjustments for losses included in net income		9	78
Net change	(99)	(86)	(73)
Cash flow hedges:
Changes in unrealized gains	183	158	177
Reclassification adjustments for gains included in net income	(189)	(161)	(104)
Net change	(6)	(3)	73
Other comprehensive loss before tax	(105)	(89)
Income tax benefit related to components of other comprehensive loss	(16)	(11)	(17)
Other comprehensive income (loss), net of taxes	(89)	(78)	17
Comprehensive income	$ 16,939	$ 13,022	$ 6,284