The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2015 and 2014 (in thousands, except per share amounts).


	2015
	March 31,			June 30,			September 30,			December 31,
Revenue	$	213,866		$	185,042		$	187,102		$	164,412
Operating expenses		170,864			163,117			159,175			160,788

Gross margin		43,002			21,925			27,927			3,624
Corporate general and administrative		9,865			6,615			8,043			8,071

Operating income (loss)		33,137			15,310			19,884			(4,447	)
Other (expense) income:
Interest expense		(2,977	)		(2,848	)		(1,840	)		(1,237	)
Gain on sale of operations, net		56			45			5			(22	)
Other income (loss), net		2,859			(1,126	)		(1,673	)		2,706

Total other (expense) income, net		(62	)		(3,929	)		(3,508	)		1,447

Income (loss) from continuing operations before income tax expense (benefit)		33,075			11,381			16,376			(3,000	)
Income tax expense (benefit)		13,572			4,696			6,787			(2,226	)

Income (loss) from continuing operations		19,503			6,685			9,589			(774	)
(Loss) income from operations of discontinued operations, net of tax		(335	)		(330	)		(561	)		(1,097	)
(Loss) gain on disposal of discontinued operations, net of tax		—			290			1,172			(35	)

Net income (loss)	$	19,168		$	6,645		$	10,200		$	(1,906	)

Earnings (loss) per share:
Basic:
Continuing operations	$	0.41		$	0.14		$	0.19		$	(0.02	)
Discontinued operations		(0.01	)		(0.01	)		0.01			(0.02	)

Net income (loss)	$	0.40		$	0.13		$	0.20		$	(0.04	)

Diluted:
Continuing operations	$	0.38		$	0.13		$	0.18		$	(0.02	)
Discontinued operations		(0.01	)		—			0.01			(0.02	)

Net income (loss)	$	0.37		$	0.13		$	0.19		$	(0.04	)

Basic weighted average common shares		48,146			49,464			51,736			51,669

Diluted weighted average common shares		51,385			52,024			54,445			51,669


	2014
	March 31,			June 30,			September 30,			December 31,
Revenue	$	204,726		$	177,466		$	180,269		$	157,022
Operating expenses		161,938			158,317			155,233			154,316

Gross margin		42,788			19,149			25,036			2,706
Corporate general and administrative		10,198			8,306			8,889			6,790

Operating income (loss)		32,590			10,843			16,147			(4,084	)
Other (expense) income:
Interest expense		(3,433	)		(3,577	)		(3,123	)		(2,991	)
Gain on sale of operations, net		8			68			17			1,210
Other income (loss), net		1,975			3,936			(1,368	)		2,350

Total other (expense) income, net		(1,450	)		427			(4,474	)		569

Income (loss) from continuing operations before income tax expense (benefit)		31,140			11,270			11,673			(3,515	)
Income tax expense (benefit)		13,114			4,824			4,353			(2,137	)

Income (loss) from continuing operations		18,026			6,446			7,320			(1,378	)
(Loss) income from operations of discontinued operations, net of tax		(263	)		(312	)		(239	)		60
(Loss) gain on disposal of discontinued operations, net of tax		(474	)		(27	)		607			(7	)

Net income (loss)	$	17,289		$	6,107		$	7,688		$	(1,325	)

Earnings (loss) per share:
Basic:
Continuing operations	$	0.37		$	0.13		$	0.15		$	(0.03	)
Discontinued operations		(0.01	)		0.00			0.01			0.00

Net income (loss)	$	0.36		$	0.13		$	0.16		$	(0.03	)

Diluted:
Continuing operations	$	0.34		$	0.12		$	0.14		$	(0.03	)
Discontinued operations		(0.01	)		0.00			0.01			0.00

Net income (loss)	$	0.33		$	0.12		$	0.15		$	(0.03	)

Basic weighted average common shares		48,182			48,273			48,451			48,455

Diluted weighted average common shares		52,618			52,052			51,209			48,455