CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Other Comprehensive Income [Abstract]
Net Income	$ 34,255	$ 36,593	$ 27,581
Other Comprehensive Income (Loss), net of tax: Unrealized (Loss) Gain on investments, net of tax benefits of $68 and $408 in 2017 and 2016, respectively, and net of tax expense of $283 in 2015	0	(741)	(757)
Comprehensive Income	$ 34,255	$ 35,852	$ 26,824