Income Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares Outstanding Used to Compute Income Per Share

The weighted average numbers of shares outstanding used to compute income per share amounts were as follows (in thousands):

	Year Ended December 31,
	2018	2017	2016
Shares used for basic per share calculations	30,099	30,671	31,032
Dilutive effect of outstanding options, RSUs, and PSUs	256	339	269
Shares used for diluted per share calculations	30,355	31,010	31,301

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The weighted average numbers of shares outstanding listed in the table below were anti-dilutive and excluded from the computation of diluted income per share, primarily because the average market price did not exceed the exercise price. These shares may be dilutive potential common shares in the future (in thousands):

	As of December 31,
	2018	2017	2016
Stock options	10	8	8
RSUs	1	—	—