Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Data

The following is selected unaudited quarterly financial data for the fiscal years ended December 31, 2016 and 2015 (amounts in thousands, except per share data).

The sum of the quarterly per share amounts may not equal the annual totals due to rounding.

	2016
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	261,497		$	296,215		$	271,720		$	319,775
Depreciation and amortization		28,773			26,409			26,706			27,928
Operating income		38,794			66,945			46,567			61,499
Income before income taxes		25,461			52,746			35,415			49,144
(Provision) benefit for income taxes		885			(1,415	)		(1,822	)		(1,048	)
Net income		26,346			51,331			33,593			48,096
Net income available to common stockholders		26,346			51,331			33,593			48,096
Net income per share		0.52			1.01			0.66			0.94
Net income per share — assuming dilution		0.51			1.00			0.66			0.94
	2015
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	253,148		$	274,036		$	252,820		$	312,120
Depreciation and amortization		28,570			28,399			28,498			28,916
Operating income		35,890			57,015			32,768			36,389
Income before income taxes		4,853			42,255			22,079			30,469
(Provision) benefit for income taxes		(321	)		(866	)		4,612			8,430
Net income		4,532			41,389			26,691			38,899
Net income available to common stockholders		4,532			41,389			26,691			38,899
Net income per share		0.09			0.81			0.52			0.76
Net income per share — assuming dilution		0.09			0.80			0.52			0.75