Earnings and Dividends per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Number of Shares Outstanding for Calculation of Earnings Per Share

The computational components of basic and diluted earnings per share for the three-month and six-month periods ended June 30, 2017 and 2016 are below.

	For the three-month period ended June 30, 2017
	Numerator (Income)		Denominator (Shares)		Per Share Amount
Basic net income and earnings per share	$	5,486		34,474	$	0.16
Effect of dilutive securities and notes:
Common stock equivalents arising from stock    options, restricted stock awards, and employee    stock purchase plan		—		333		—
Diluted earnings and earnings per share	$	5,486		34,807	$	0.16

	For the three-month period ended June 30, 2016
	Numerator (Income)		Denominator (Shares)		Per Share Amount
Basic net income and earnings per share	$	4,050		33,946	$	0.12
Effect of dilutive securities and notes:
Common stock equivalents arising from stock    options, restricted stock awards, and employee    stock purchase plan		—		216		—
Diluted earnings and earnings per share	$	4,050		34,162	$	0.12

	For the six-month period ended June 30, 2017
	Numerator (Income)		Denominator (Shares)		Per Share Amount
Basic net income and earnings per share	$	5,524		34,345	$	0.16
Effect of dilutive securities and notes:
Common stock equivalents arising from stock    options, restricted stock awards, and employee    stock purchase plan		—		341		—
Diluted earnings and earnings per share	$	5,524		34,686	$	0.16

	For the six-month period ended June 30, 2016
	Numerator (Income)		Denominator (Shares)		Per Share Amount
Basic net income and earnings per share	$	7,150		33,937	$	0.21
Effect of dilutive securities and notes:
Common stock equivalents arising from stock    options, restricted stock awards, and employee    stock purchase plan		—		202		—
Diluted earnings and earnings per share	$	7,150		34,139	$	0.21