Business Combinations Pro Forma Results of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition, Pro Forma Information [Abstract]
Revenues	$ 148,172	$ 143,388
Net income	$ 9,605	$ 5,478
Basic net income per share	$ 0.30	$ 0.17
Diluted net income per share	$ 0.29	$ 0.17
Shares used in computing basic net income per share	31,800	31,468
Shares used in computing diluted net income per share	32,981	32,434