Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Computation of Basic Earnings and Diluted Earnings Per Share Data

Basic earnings and diluted earnings per share data were computed as follows:

	Years Ended December 31,
	2016		2015		2014
Numerator for basic and diluted earnings per share:
Net income	$	109,857	$	64,869	$	58,940
Denominator:
Weighted-average basic common shares outstanding	36,448		34,137		33,011
Assumed conversion of dilutive securities:
Stock options	2,513		2,415		2,390
Denominator for diluted earnings per share    - Adjusted weighted-average shares	38,961		36,552		35,401
Earnings per common share:
Basic	$	3.01	$	1.90	$	1.79
Diluted	$	2.82	$	1.77	$	1.66