Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	Revenues		Gross Profit		Net Income (Loss)		Net Income (Loss) Per Share— Basic(2)		Net Income (Loss) Per Share— Diluted(2)
	(In thousands, except per share amounts)
2016
1st Quarter	$	163,524	$	99,424	$	25,543	$	1.38	$	1.37
2nd Quarter	160,258		97,375		26,829		1.46		1.45
3rd Quarter	156,017		91,684		24,273		1.33		1.33
4th Quarter	154,174		90,935		21,347		1.18		1.18
2015
1st Quarter	$	175,814	$	100,286	$	28,412	$	1.49	$	1.47
2nd Quarter	171,549		96,807		26,897		1.41		1.40
3rd Quarter	162,437		96,685		24,257		1.29		1.28
4th Quarter (1)	171,300		105,228		25,357		1.36		1.35

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⁽¹⁾Fiscal 2015 consisted of 53 calendar weeks, with the 4th quarter containing 14 calendar weeks.

⁽²⁾The quarterly amounts may not add to the full year amount as each quarterly calculation is discrete from the full-year calculation.