Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Valuation Assumptions of Granted Stock Options

The following table summarizes information about these granted stock options:

	2014			2013			2012
Weighted-average risk-free interest rate		1.83	%		N/A			N/A
Dividend yield		—			N/A			N/A
Weighted-average expected volatility		45.18	%		N/A			N/A
Total weighted-average expected forfeiture rate		7.88	%		N/A			N/A
Weighted-average expected life (years)		5.90			N/A			N/A
Total weighted-average remaining vesting period in years (1)		5.83			2.45			3.38
Total fair value of options granted	$	7,262,000			N/A			N/A
Stock-based compensation expense - Cost of sales (1)	$	255,000		$	227,000		$	278,000
Stock-based compensation expense - SG&A (1)	$	1,660,000		$	1,315,000		$	1,374,000
Income tax benefit (1)	$	(747,000	)	$	(601,000	)	$	(603,000	)

(1) Information relates to stock options granted since 2006.

Stock Option Activities of Stock Option Plans

The following information relates to our stock option plans:

	December 31, 2014
	2008 Plan		1998 Plan		Outside Director Plan
Maximum number of securities for issuance		1,975,000		N/A		400,000
Number of awards available to be granted		869,170		N/A		280,000
Number of options outstanding		828,848		7,000		—
Number of options exercisable		228,748		7,000		—

	2014
	Shares			Weighted- Average Exercise Price
Outstanding at beginning of year		599,630		$	18.57
Granted		489,000		$	33.13
Exercised		(121,742	)	$	8.82
Cancelled, forfeited or expired		(11,040	)	$	33.71
Outstanding at end of year		955,848		$	27.09
Exercisable at end of year		265,748		$	19.36

	2014		2013		2012
Weighted-average fair value per option granted during year	$	14.85		N/A		N/A
Total intrinsic value of options exercised during the year	$	3,461,000	$	2,970,000	$	2,469,000
Total fair value of options vested during the year	$	1,502,000	$	1,565,000	$	1,592,000

Stock Options Outstanding and Exercisable

	Stock Options Outstanding At December 31, 2014
Exercise Prices	Shares Outstanding		Weighted- Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Intrinsic Value of Shares Outstanding
$ 5.10		7,000		0.92	$	5.10	$	184,000
$ 7.86 - $8.17		162,950		2.19	$	7.97		3,825,000
$ 9.69 - $9.97		75,248		3.73	$	9.69		1,636,000
$29.99 - $34.50		710,650		8.81	$	33.53		8,000
$  5.10 - $34.50		955,848		7.22	$	27.09	$	5,653,000
	Stock Options Exercisable At December 31, 2014
Exercise Prices	Shares Outstanding		Weighted- Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Intrinsic Value of Shares Outstanding
$ 5.10		7,000		0.92	$	5.10	$	184,000
$ 7.86 - $8.17		72,950		2.73	$	7.92		1,716,000
$ 9.69 - $9.97		75,248		3.73	$	9.69		1,636,000
$29.99 - $34.50		110,550		6.80	$	34.40		4,000
$  5.10 - $34.50		265,748		4.66	$	19.36	$	3,540,000