Description of Business and Summary of Significant Accounting Policies (EPS) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income	$ 5,711	$ 5,034	$ 13,317	$ 9,596
Denominator:
Weighted average common stock outstanding for basic net income per common share (in shares)	26,397	25,050	26,116	24,551
Effect of dilutive securities—stock options and restricted stock units (in shares)	1,274	2,072	1,373	1,842
Weighted average common shares and dilutive securities outstanding (in shares)	27,671	27,122	27,489	26,393

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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