Computation of Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Summary of Calculation of Basic Earnings Per Common Share and Diluted Earnings Per Common Share

The calculation of basic earnings per common share and diluted earnings per common share is as follows (in thousands except per share amounts):

	For The Years Ended December 31,
	2017		2016		2015
Numerator:
Net income	$	91,156	$	48,024	$	55,016
Denominator:
Denominator for basic earnings per share–weighted      average common shares		25,518		25,038		24,919
Effect of dilutive stock options and restricted stock		142		51		93
Effect of other common stock equivalents		426		591		459
Denominator for diluted earnings per share–adjusted      weighted average common shares		26,086		25,680		25,471
Basic Earnings Per Share	$	3.57	$	1.92	$	2.21
Diluted Earnings Per Share	$	3.49	$	1.87	$	2.16