Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2013

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands, except per share amounts)	2013		2012		2013		2012
Net income available to common stockholders	$	18,502	$	15,859	$	23,297	$	23,060
Basic weighted average shares outstanding	48,529		48,340		48,532		48,307
Dilutive effect of potential common stock equivalents — stock options	99		79		95		71
Diluted weighted average shares outstanding	48,628		48,419		48,627		48,378
Earnings per common share:
Basic	$	0.38	$	0.33	$	0.48	$	0.48
Diluted	0.38		0.33		0.48		0.48
Potentially dilutive securities excluded from earnings per diluted share because their effect is anti-dilutive	—		1,711		—		1,711

Stock option and restricted stock unit activity of the entity

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(in thousands)	2013			2012			2013			2012
Stock-based compensation expense recognized in operating expenses	$	2,807		$	2,052		$	5,686		$	5,120
Tax benefit of stock-based compensation expense in provision for income taxes	896			705			1,944			1,771
Stock-based compensation expense, net of tax	$	1,911		$	1,347		$	3,742		$	3,349
Fair value of shares vested	$	2,836		$	1,895		$	5,649		$	5,005
Proceeds to the Company from the exercise of stock-based compensation	$	280		$	225		$	776		$	1,983
Tax effect from exercise of stock-based compensation, including shortfall tax benefits	$	(7	)	$	(54	)	$	(1,850	)	$	(56	)

	At June 30,
	2013		2012
Stock-based compensation cost capitalized in inventory	$	384	$	229

Summary of financial instruments

	At June 30,				At December 31,
(in thousands)	2013		2012		2012
Financial instruments	$	60,725	$	51,283	$	76,130

Schedule of effective tax rates and income tax expense

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(in thousands, except percentage amounts)	2013			2012			2013			2012

Effective tax rate	37.7		%	41.7		%	39.8		%	43.5		%

Provision for income taxes	$	11,177		$	11,347		$	15,434		$	17,719

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring and/or nonrecurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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