Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 61,338	$ 37,729	$ 30,518
Weighted-average shares outstanding — basic (in shares)	41,462	39,242	37,483
Effect of dilutive securities from stock award plans (in shares)	1,481	1,317	1,229
Weighted-average shares outstanding — diluted (in shares)	42,943	40,559	38,712
Net income per share - basic (in dollars per share)	$ 1.48	$ 0.96	$ 0.81
Net income per share - diluted (in dollars per share)	$ 1.43	$ 0.93	$ 0.79
Anti-dilutive weighted-average shares related to stock award plans (in shares)	926	1,279	501