Net Income per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Reconciliation of Basic to Diluted Net Income per Share

The following is a reconciliation of basic to diluted net income per share:

	Quarter Ended				Year to Date Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Net income	$	12,313	$	13,277	$	40,321	$	38,987
Shares used in net income per common share - basic		29,010		29,008		29,101		28,912
Incremental shares of unvested restricted common stock		39		66		77		89
Shares used in net income per common share - diluted		29,049		29,074		29,178		29,001
Earnings per share:
Basic net income	$	0.42	$	0.46	$	1.39	$	1.35
Diluted net income	$	0.42	$	0.46	$	1.38	$	1.34