Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Basic and Diluted

	Year Ended December 31,
	2017		2016		2015
Numerator — basic and diluted
Net income	$	107,962	$	85,520	$	66,053
Denominator
Weighted average number of common shares outstanding — basic	38,697		40,943		40,846
Effect of dilutive stock options	117		281		388
Effect of dilutive restricted shares	378		485		495
Weighted average number of common shares outstanding — diluted	39,192		41,709		41,729
Earnings per common share — basic	$	2.79	$	2.09	$	1.62
Earnings per common share — diluted	$	2.75	$	2.05	$	1.58
Antidilutive stock options and restricted shares	1,561		1,404		1,734