Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Reconciliation of basic earnings per share ("EPS") to diluted EPS

The following is a reconciliation of basic earnings per common share to diluted earnings per share:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2015		2014		2015		2014
Net income available to common stockholders	$	21,595	$	20,614	$	53,156	$	53,151
Basic weighted-average shares outstanding	48,998		49,010		49,157		48,972
Dilutive effect of potential common stock equivalents — stock options and    restricted stock units	241		217		220		200
Diluted weighted-average shares outstanding	49,239		49,227		49,377		49,172
Earnings per common share:
Basic	$	0.44	$	0.42	$	1.08	$	1.09
Diluted	$	0.44	$	0.42	$	1.08	$	1.08
Potentially dilutive securities excluded from earnings per diluted share because their effect is anti-dilutive	—		—		—		—

Stock option and restricted stock unit activity of the entity

The following table represents the Company’s stock option and restricted stock unit activity for the three and nine months ended September 30,2015 and 2014:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2015			2014			2015			2014
Stock-based compensation expense recognized in operating expenses	$	2,794		$	3,041		$	8,869		$	8,781
Less: Tax benefit of stock-based compensation expense in provision for           income taxes	1,005			1,075			3,144			3,142
Stock-based compensation expense, net of tax	$	1,789		$	1,966		$	5,725		$	5,639
Fair value of shares vested	$	2,749		$	3,098		$	8,744		$	8,789
Proceeds to the Company from the exercise of stock-based compensation	$	1,443		$	1,551		$	7,019		$	4,178
Tax effect from the exercise of stock-based compensation, including shortfall          tax benefits	$	(58	)	$	(89	)	$	(244	)	$	(275	)

	At September 30,
(in thousands)	2015		2014
Stock-based compensation cost capitalized in inventory	$	464	$	525

Summary of financial instruments

The balances of the Company’s primary financial instruments were as follows:

	At September 30,				At December 31,
(in thousands)	2015		2014		2014
Financial instruments	$	76,488	$	98,568	$	99,024

Schedule of effective tax rates and income tax expense

The following table presents the Company’s effective tax rates and income tax expense for the three and nine months ended September 30,2015 and 2014:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands, except percentages)	2015			2014			2015			2014
Effective tax rate	38.4		%	36.0		%	38.4		%	36.7		%
Provision for income taxes	$	13,479		$	11,577		$	33,115		$	30,849

Schedule of Restructuring Reserve by Type of Cost

The following table provides a rollforward of the liability balance for these costs, as well as other non-employee costs associated with the sales office closing, incurred as of September 30, 2015:

In thousands	Employee Severance Obligation			Other Associated Costs			Total
Balance at June 30, 2015	$	235		$	476		$	711
Charges	536			—			536
Cash payments	(418		)	(92		)	(510		)
Balance at September 30, 2015	$	353		$	384		$	737