The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted (in thousands, except per share data):



	Three months ended March 31,
	2016		2015
Net income	$	15,901	$	9,686
Weighted average number of common shares outstanding (for basic calculation)	16,042		15,693
Dilutive securities	514		541
Weighted average common and common equivalent shares outstanding (for diluted calculation)	16,556		16,234
EPS — basic	$	0.99	$	0.62
EPS — diluted	$	0.96	$	0.60

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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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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