Earnings per Common Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share amounts):

	Year Ended December 31,
	2018			2017			2016
Numerators:
Consolidated net income	$	51,095		$	62,307		$	22,003
Less: Net income attributable to noncontrolling interest		(1,986	)		(2,256	)		—
Net income attributable to Novanta Inc.		49,109			60,051			22,003
Redeemable noncontrolling interest redemption value adjustment (see Note 5)		1,781			(20,244	)		—
Net income attributable to Novanta Inc. after adjustment for redeemable noncontrolling interest redemption value	$	50,890		$	39,807		$	22,003
Denominators:
Weighted average common shares outstanding— basic		34,913			34,817			34,694
Dilutive potential common shares		560			463			220
Weighted average common shares outstanding— diluted		35,473			35,280			34,914
Antidilutive common shares excluded from above		4			—			85
Earnings per Common Share Attributable to Novanta Inc.:
Basic	$	1.46		$	1.14		$	0.63
Diluted	$	1.43		$	1.13		$	0.63