Interim Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Summary of Interim Financial Data

	Three Months Ended
	December 31, 2014		September 30, 2014		June 30, 2014		March 31, 2014		December 31, 2013 (a)		September 30, 2013 (b)			June 30, 2013		March 31, 2013
	(In thousands, except per share data)
Net sales		74,202		95,502		121,311		100,645		63,831		72,249			98,551		107,880
Gross profit		26,635		30,369		45,026		38,167		19,685		151			36,922		41,860
Net income (loss)		5,153		8,913		15,161		12,295		15,103		(15,298	)		13,224		21,569
Basic net income (loss) per share	$	0.16	$	0.28	$	0.46	$	0.37	$	0.46	$	(0.45	)	$	0.39	$	0.64
Diluted net income (loss) per share	$	0.16	$	0.28	$	0.46	$	0.37	$	0.45	$	(0.45	)	$	0.38	$	0.62

(a) Three months ended December 31, 2013 was materially affected by a $10.9 million benefit as a direct result of the Company’s decision to exit a full valuation allowance.

(b) Three months ended September 30, 2013 was materially affected by a pre-tax increase of $20.0 million to the surface flaking warranty reserve.