Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Data [Abstract]

Quarterly Data (Unaudited)

	Quarter Ended
	March 31,			June 30,			September 30,			December 31,
	(Dollars in thousands, except per share amounts)
2017:
Revenues	$	219,752		$	406,840		$	512,530		$	467,467
Less—promotional allowances		(18,827	)		(33,226	)		(41,785	)		(39,247	)
Net revenues		200,925			373,614			470,745			428,220
Operating expenses		184,972			318,635			387,267			414,298
Operating income (loss)		14,149			(30,632	)		81,365			29,987
Net income (loss)	$	1,021		$	(46,328	)	$	29,554		$	89,693
Basic net income (loss) per common share	$	0.02		$	(0.69	)	$	0.38		$	1.17
Diluted net income (loss) per common share	$	0.02		$	(0.68	)	$	0.38		$	1.15
Weighted average shares outstanding—basic		47,120,751			67,453,095			76,902,070			76,961,015
Weighted average shares outstanding—diluted		48,081,281			68,469,191			77,959,689			77,998,742

	Quarter Ended
	March 31,			June 30,			September 30,			December 31,
	(Dollars in thousands, except per share amounts)
2016:
Revenues	$	234,551		$	255,010		$	266,256		$	227,379
Less—promotional allowances		(20,985	)		(23,695	)		(24,691	)		(20,929	)
Net revenues		213,566			231,315			241,565			206,450
Operating expenses		194,854			200,768			208,731			189,405
Operating income		18,263			29,655			28,109			13,091
Net income	$	3,370		$	10,791		$	9,682		$	959
Basic net income per common share	$	0.07		$	0.23		$	0.21		$	0.02
Diluted net income per common share	$	0.07		$	0.23		$	0.20		$	0.02
Weighted average shares outstanding—basic		46,933,094			47,071,608			47,193,120			47,105,744
Weighted average shares outstanding—diluted		47,534,761			47,721,075			47,834,644			47,849,554

	Quarter Ended
	March 31,			June 30,			September 30,			December 31,
	(Dollars in thousands, except per share amounts)
2015:
Revenues	$	182,809		$	198,356		$	199,536		$	203,840
Less—promotional allowances		(15,358	)		(15,723	)		(15,996	)		(17,680	)
Net revenues		167,451			182,633			183,540			186,160
Operating expenses		154,766			160,430			161,610			171,464
Operating income		12,084			23,059			24,092			13,281
Net (loss) income	$	(6,164	)	$	4,795		$	5,399		$	110,153
Basic net (loss) income per common share	$	(0.13	)	$	0.10		$	0.12		$	2.36
Diluted net (loss) income per common share	$	(0.13	)	$	0.10		$	0.12		$	2.33
Weighted average shares outstanding—basic		46,494,638			46,516,614			46,516,614			46,670,735
Weighted average shares outstanding—diluted		46,494,638			46,657,618			46,763,589			47,227,127